-(7-5a)-4(a+7)=-42

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Solution for -(7-5a)-4(a+7)=-42 equation:


-(7-5a)-4(a+7)=-42

We simplify the equation to the form, which is simple to understand 
-(7-5a)-4(a+7)=-42

Remove unnecessary parentheses
-7+5a-4*(a+7)=-42

Reorder the terms in parentheses
-7+5a+(-4a-28)=-42

Remove unnecessary parentheses
-7+5a-4a-28=-42

We move all terms containing a to the left and all other terms to the right. 
+5a-4a=-42+7+28

We simplify left and right side of the equation. 
+1a=-7

We divide both sides of the equation by 1 to get a. 
a=-7

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