-3(7x)=--42

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


-3(7x)=--42

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

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

Remove unnecessary parentheses
-21x=+42

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

We simplify left and right side of the equation. 
-21x=+42

We divide both sides of the equation by -21 to get x. 
x=-2

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