-71=10(a-4)+9

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Solution for -71=10(a-4)+9 equation: 



-71=10(a-4)+9

We move all terms to the left:

-71-(10(a-4)+9)=0



We calculate terms in parentheses: -(10(a-4)+9), so:

10(a-4)+9

We multiply parentheses

10a-40+9

We add all the numbers together, and all the variables

10a-31

Back to the equation:

-(10a-31)



We get rid of parentheses

-10a+31-71=0

We add all the numbers together, and all the variables

-10a-40=0

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

-10a=40

a=40/-10

a=-4

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