90-x+90-3(2x)=90

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Solution for 90-x+90-3(2x)=90 equation:


90-x+90-3(2x)=90

We simplify the equation to the form, which is simple to understand 
90-x+90-3(2x)=90

Reorder the terms in parentheses
90-x+90+(-6x)=90

Remove unnecessary parentheses
+90-x+90-6x=+90

We move all terms containing x to the left and all other terms to the right. 
-1x-6x=+90-90-90

We simplify left and right side of the equation. 
-7x=-90

We divide both sides of the equation by -7 to get x. 
x=12.8571428571

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