7(r-1)+3r=-18-r

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Solution for 7(r-1)+3r=-18-r equation: 



7(r-1)+3r=-18-r

We move all terms to the left:

7(r-1)+3r-(-18-r)=0

We add all the numbers together, and all the variables

7(r-1)+3r-(-1r-18)=0

We add all the numbers together, and all the variables

3r+7(r-1)-(-1r-18)=0

We multiply parentheses

3r+7r-(-1r-18)-7=0

We get rid of parentheses

3r+7r+1r+18-7=0

We add all the numbers together, and all the variables

11r+11=0

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

11r=-11

r=-11/11

r=-1

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