(90-2x)+(30+3x)+(3x-40)=180

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Solution for (90-2x)+(30+3x)+(3x-40)=180 equation:


(90-2x)+(30+3x)+(3x-40)=180

We simplify the equation to the form, which is simple to understand 
(90-2x)+(30+3x)+(3x-40)=180

Remove unnecessary parentheses
90-2x+(30+3x)+(3x-40)=180

Remove unnecessary parentheses
+90-2x+30+3x+(+3x-40+)=+180

Remove unnecessary parentheses
+90-2x+30+3x+3x-40=+180

We move all terms containing x to the left and all other terms to the right. 
-2x+3x+3x=+180-90-30+40

We simplify left and right side of the equation. 
+4x=+100

We divide both sides of the equation by 4 to get x. 
x=25

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