Solution - Linear equations with one unknown

Rearrange:

Rearrange the equation by subtracting what is to the right of the equal sign from both sides of the equation :

                -7-2*u+7-(3*(-u-10)+4*u)=0 

Step by step solution :

Step  1  :

Step  2  :

Pulling out like terms :

 2.1     Pull out like factors :

   -u - 10  =   -1 • (u + 10) 

Equation at the end of step  2  :

  -2u -  (-3 • (u + 10) +  4u)  = 0 

Step  3  :

Step  4  :

Pulling out like terms :

 4.1     Pull out like factors :

   30 - 3u  =   -3 • (u - 10) 

Equation at the end of step  4  :

  -3 • (u - 10)  = 0 

Step  5  :

Equations which are never true :

 5.1      Solve :    -3   =  0

This equation has no solution.
A a non-zero constant never equals zero.

Solving a Single Variable Equation :

 5.2      Solve  :    u-10 = 0 

 Add  10  to both sides of the equation : 
                      u = 10

One solution was found :