-21=5(v-5)-7v

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Solution for -21=5(v-5)-7v equation: 



-21=5(v-5)-7v

We move all terms to the left:

-21-(5(v-5)-7v)=0



We calculate terms in parentheses: -(5(v-5)-7v), so:

5(v-5)-7v

We add all the numbers together, and all the variables

-7v+5(v-5)

We multiply parentheses

-7v+5v-25

We add all the numbers together, and all the variables

-2v-25

Back to the equation:

-(-2v-25)



We get rid of parentheses

2v+25-21=0

We add all the numbers together, and all the variables

2v+4=0

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

2v=-4

v=-4/2

v=-2

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