3(180-x)-7(90-x)=(1/3)(90)

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Solution for 3(180-x)-7(90-x)=(1/3)(90) equation:


3(180-x)-7(90-x)=(1/3)(90)

We simplify the equation to the form, which is simple to understand 
3(180-x)-7(90-x)=(1/3)*(90)

Reorder the terms in parentheses
+(+540-3x)-7*(90-x)=( + 0.33333333333333)*(90)

Remove unnecessary parentheses
+540-3x-7+*(+90-x+)=+( + 0.33333333333333+)+*(+90+)

Reorder the terms in parentheses
+540-3x+(-630+7x)=( + 0.33333333333333)*(90)

Remove unnecessary parentheses
+540-3x-630+7x=+( + 0.33333333333333+)+*(+90+)

Reorder the terms in parentheses
multiplication of parentheses
+540-3x-630+7x=(+30)



Remove unnecessary parentheses
+540-3x-630+7x=+30

We move all terms containing x to the left and all other terms to the right. 
-3x+7x=+30-540+630

We simplify left and right side of the equation. 
+4x=+120

We divide both sides of the equation by 4 to get x. 
x=30

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