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-7(x+3)+6(2x+9)=6(x+3)
We simplify the equation to the form, which is simple to understand
-7(x+3)+6(2x+9)=6(x+3)
Reorder the terms in parentheses
+(-7x-21)+6*(2x+9)=6*(x+3)
Remove unnecessary parentheses
-7x-21+6+*(+2x+9+)=+6+*(+x+3+)
Reorder the terms in parentheses
-7x-21+(+12x+54)=6*(x+3)
Remove unnecessary parentheses
-7x-21+12x+54=+6+*(+x+3+)
Reorder the terms in parentheses
-7x-21+12x+54=+(+6x+18)
Remove unnecessary parentheses
-7x-21+12x+54=+6x+18
We move all terms containing x to the left and all other terms to the right.
-7x+12x-6x=+18+21-54
We simplify left and right side of the equation.
-1x=-15
We divide both sides of the equation by -1 to get x.
x=15
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