-31=2(u-8)-7u

Solution for -31=2(u-8)-7u equation:

-31=2(u-8)-7u

We move all terms to the left:

-31-(2(u-8)-7u)=0


We calculate terms in parentheses: -(2(u-8)-7u), so:

2(u-8)-7u

We add all the numbers together, and all the variables

-7u+2(u-8)

We multiply parentheses

-7u+2u-16

We add all the numbers together, and all the variables

-5u-16

Back to the equation:

-(-5u-16)


We get rid of parentheses

5u+16-31=0

We add all the numbers together, and all the variables

5u-15=0

We move all terms containing u to the left, all other terms to the right

5u=15

u=15/5

u=3