161=7(3-4a)

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Solution for 161=7(3-4a) equation: 



161=7(3-4a)

We move all terms to the left:

161-(7(3-4a))=0

We add all the numbers together, and all the variables

-(7(-4a+3))+161=0



We calculate terms in parentheses: -(7(-4a+3)), so:

7(-4a+3)

We multiply parentheses

-28a+21

Back to the equation:

-(-28a+21)



We get rid of parentheses

28a-21+161=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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