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42=2(9)+2(3x)
We simplify the equation to the form, which is simple to understand
42=2(9)+2(3x)
Reorder the terms in parentheses
42=+(+18)+2*(3x)
Remove unnecessary parentheses
+42=+18+2+*(+3x+)
Reorder the terms in parentheses
42=+18+(+6x)
Remove unnecessary parentheses
+42=+18+6x
We move all terms containing x to the left and all other terms to the right.
-6x=+18-42
We simplify left and right side of the equation.
-6x=-24
We divide both sides of the equation by -06 to get x.
x=4
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