71=4x-9

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Solution for 71=4x-9 equation: 



71=4x-9

We move all terms to the left:

71-(4x-9)=0

We get rid of parentheses

-4x+9+71=0

We add all the numbers together, and all the variables

-4x+80=0

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

-4x=-80

x=-80/-4

x=+20

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