165=4(5-7a)+5

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Solution for 165=4(5-7a)+5 equation: 



165=4(5-7a)+5

We move all terms to the left:

165-(4(5-7a)+5)=0

We add all the numbers together, and all the variables

-(4(-7a+5)+5)+165=0



We calculate terms in parentheses: -(4(-7a+5)+5), so:

4(-7a+5)+5

We multiply parentheses

-28a+20+5

We add all the numbers together, and all the variables

-28a+25

Back to the equation:

-(-28a+25)



We get rid of parentheses

28a-25+165=0

We add all the numbers together, and all the variables

28a+140=0

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

28a=-140

a=-140/28

a=-5

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