Solution - Adding, subtracting and finding the least common multiple
Step by Step Solution
Rearrange:
Rearrange the equation by subtracting what is to the right of the less equal sign from both sides of the inequality :
1/2*m+2/3-(2/3*m+2)≤0
Step by step solution :
Step 1 :
2
Simplify —
3
Equation at the end of step 1 :
1 2 2
((—•m)+—)-((—•m)+2) ≤ 0
2 3 3
Step 2 :
Rewriting the whole as an Equivalent Fraction :
2.1 Adding a whole to a fraction
Rewrite the whole as a fraction using 3 as the denominator :
2 2 • 3
2 = — = —————
1 3
Equivalent fraction : The fraction thus generated looks different but has the same value as the whole
Common denominator : The equivalent fraction and the other fraction involved in the calculation share the same denominator
Adding fractions that have a common denominator :
2.2 Adding up the two equivalent fractions
Add the two equivalent fractions which now have a common denominator
Combine the numerators together, put the sum or difference over the common denominator then reduce to lowest terms if possible:
2m + 2 • 3 2m + 6
—————————— = ——————
3 3
Equation at the end of step 2 :
1 2 (2m + 6)
((— • m) + —) - ———————— ≤ 0
2 3 3
Step 3 :
2
Simplify —
3
Equation at the end of step 3 :
1 2 (2m + 6)
((— • m) + —) - ———————— ≤ 0
2 3 3
Step 4 :
1
Simplify —
2
Equation at the end of step 4 :
1 2 (2m + 6)
((— • m) + —) - ———————— ≤ 0
2 3 3
Step 5 :
Calculating the Least Common Multiple :
5.1 Find the Least Common Multiple
The left denominator is : 2
The right denominator is : 3
Prime Factor | Left Denominator | Right Denominator | L.C.M = Max {Left,Right} |
---|---|---|---|
2 | 1 | 0 | 1 |
3 | 0 | 1 | 1 |
Product of all Prime Factors | 2 | 3 | 6 |
Least Common Multiple:
6
Calculating Multipliers :
5.2 Calculate multipliers for the two fractions
Denote the Least Common Multiple by L.C.M
Denote the Left Multiplier by Left_M
Denote the Right Multiplier by Right_M
Denote the Left Deniminator by L_Deno
Denote the Right Multiplier by R_Deno
Left_M = L.C.M / L_Deno = 3
Right_M = L.C.M / R_Deno = 2
Making Equivalent Fractions :
5.3 Rewrite the two fractions into equivalent fractions
Two fractions are called equivalent if they have the same numeric value.
For example : 1/2 and 2/4 are equivalent, y/(y+1)2 and (y2+y)/(y+1)3 are equivalent as well.
To calculate equivalent fraction , multiply the Numerator of each fraction, by its respective Multiplier.
L. Mult. • L. Num. m • 3 —————————————————— = ————— L.C.M 6 R. Mult. • R. Num. 2 • 2 —————————————————— = ————— L.C.M 6
Adding fractions that have a common denominator :
5.4 Adding up the two equivalent fractions
m • 3 + 2 • 2 3m + 4
————————————— = ——————
6 6
Equation at the end of step 5 :
(3m + 4) (2m + 6)
———————— - ———————— ≤ 0
6 3
Step 6 :
Step 7 :
Pulling out like terms :
7.1 Pull out like factors :
2m + 6 = 2 • (m + 3)
Calculating the Least Common Multiple :
7.2 Find the Least Common Multiple
The left denominator is : 6
The right denominator is : 3
Prime Factor | Left Denominator | Right Denominator | L.C.M = Max {Left,Right} |
---|---|---|---|
2 | 1 | 0 | 1 |
3 | 1 | 1 | 1 |
Product of all Prime Factors | 6 | 3 | 6 |
Least Common Multiple:
6
Calculating Multipliers :
7.3 Calculate multipliers for the two fractions
Denote the Least Common Multiple by L.C.M
Denote the Left Multiplier by Left_M
Denote the Right Multiplier by Right_M
Denote the Left Deniminator by L_Deno
Denote the Right Multiplier by R_Deno
Left_M = L.C.M / L_Deno = 1
Right_M = L.C.M / R_Deno = 2
Making Equivalent Fractions :
7.4 Rewrite the two fractions into equivalent fractions
L. Mult. • L. Num. (3m+4) —————————————————— = —————— L.C.M 6 R. Mult. • R. Num. 2 • (m+3) • 2 —————————————————— = ————————————— L.C.M 6
Adding fractions that have a common denominator :
7.5 Adding up the two equivalent fractions
(3m+4) - (2 • (m+3) • 2) -m - 8
———————————————————————— = ——————
6 6
Step 8 :
Pulling out like terms :
8.1 Pull out like factors :
-m - 8 = -1 • (m + 8)
Equation at the end of step 8 :
-m - 8
—————— ≤ 0
6
Step 9 :
9.1 Multiply both sides by 6
9.2 Multiply both sides by (-1)
Flip the inequality sign since you are multiplying by a negative number
m+8 ≥ 0
Solve Basic Inequality :
9.3 Subtract 8 from both sides
m ≥ -8
Inequality Plot :
9.4 Inequality plot for
-0.167 m - 1.333 ≤ 0
One solution was found :
m ≥ -8How did we do?
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