-91=3x-7(x+9)

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Solution for -91=3x-7(x+9) equation:


-91=3x-7(x+9)

We simplify the equation to the form, which is simple to understand 
-91=3x-7(x+9)

Reorder the terms in parentheses
-91=3x+(-7x-63)

Remove unnecessary parentheses
-91=+3x-7x-63

We move all terms containing x to the left and all other terms to the right. 
-3x+7x=-63+91

We simplify left and right side of the equation. 
+4x=+28

We divide both sides of the equation by 4 to get x. 
x=7

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