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78=4x+2(2x+3)
We simplify the equation to the form, which is simple to understand
78=4x+2(2x+3)
Reorder the terms in parentheses
78=4x+(+4x+6)
Remove unnecessary parentheses
+78=+4x+4x+6
We move all terms containing x to the left and all other terms to the right.
-4x-4x=+6-78
We simplify left and right side of the equation.
-8x=-72
We divide both sides of the equation by -8 to get x.
x=9
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