x-(90-x)=12

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Solution for x-(90-x)=12 equation:


x-(90-x)=12

We simplify the equation to the form, which is simple to understand 
x-(90-x)=12

Remove unnecessary parentheses
x-90+1x=12

We move all terms containing x to the left and all other terms to the right. 
+1x+1x=+12+90

We simplify left and right side of the equation. 
+2x=+102

We divide both sides of the equation by 2 to get x. 
x=51

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