87=9a-3

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Solution for 87=9a-3 equation: 



87=9a-3

We move all terms to the left:

87-(9a-3)=0

We get rid of parentheses

-9a+3+87=0

We add all the numbers together, and all the variables

-9a+90=0

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

-9a=-90

a=-90/-9

a=+10

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