157=-3(7r+3)-2

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Solution for 157=-3(7r+3)-2 equation: 



157=-3(7r+3)-2

We move all terms to the left:

157-(-3(7r+3)-2)=0



We calculate terms in parentheses: -(-3(7r+3)-2), so:

-3(7r+3)-2

We multiply parentheses

-21r-9-2

We add all the numbers together, and all the variables

-21r-11

Back to the equation:

-(-21r-11)



We get rid of parentheses

21r+11+157=0

We add all the numbers together, and all the variables

21r+168=0

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

21r=-168

r=-168/21

r=-8

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