7=3(x+4)-(x-9)

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Solution for 7=3(x+4)-(x-9) equation:


7=3(x+4)-(x-9)

We simplify the equation to the form, which is simple to understand 
7=3(x+4)-(x-9)

Reorder the terms in parentheses
7=+(+3x+12)-(x-9)

Remove unnecessary parentheses
+7=+3x+12-(+x-9+)

Remove unnecessary parentheses
7=+3x+12-1x+9

We move all terms containing x to the left and all other terms to the right. 
-3x+1x=+12+9-7

We simplify left and right side of the equation. 
-2x=+14

We divide both sides of the equation by -2 to get x. 
x=-7

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