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78=5x+6(x+2)
We simplify the equation to the form, which is simple to understand
78=5x+6(x+2)
Reorder the terms in parentheses
78=5x+(+6x+12)
Remove unnecessary parentheses
+78=+5x+6x+12
We move all terms containing x to the left and all other terms to the right.
-5x-6x=+12-78
We simplify left and right side of the equation.
-11x=-66
We divide both sides of the equation by -11 to get x.
x=6
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