12x-3(x+7)=42

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Solution for 12x-3(x+7)=42 equation:


12x-3(x+7)=42

We simplify the equation to the form, which is simple to understand 
12x-3(x+7)=42

Reorder the terms in parentheses
12x+(-3x-21)=42

Remove unnecessary parentheses
+12x-3x-21=+42

We move all terms containing x to the left and all other terms to the right. 
+12x-3x=+42+21

We simplify left and right side of the equation. 
+9x=+63

We divide both sides of the equation by 9 to get x. 
x=7

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