-153=-7(-3-5a)+1

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Solution for -153=-7(-3-5a)+1 equation: 



-153=-7(-3-5a)+1

We move all terms to the left:

-153-(-7(-3-5a)+1)=0

We add all the numbers together, and all the variables

-(-7(-5a-3)+1)-153=0



We calculate terms in parentheses: -(-7(-5a-3)+1), so:

-7(-5a-3)+1

We multiply parentheses

35a+21+1

We add all the numbers together, and all the variables

35a+22

Back to the equation:

-(35a+22)



We get rid of parentheses

-35a-22-153=0

We add all the numbers together, and all the variables

-35a-175=0

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

-35a=175

a=175/-35

a=-5

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