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12x-3(6)=42
We simplify the equation to the form, which is simple to understand
12x-3(6)=42
Reorder the terms in parentheses
12x+(-18)=42
Remove unnecessary parentheses
+12x-18=+42
We move all terms containing x to the left and all other terms to the right.
+12x=+42+18
We simplify left and right side of the equation.
+12x=+60
We divide both sides of the equation by 12 to get x.
x=5
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