x+(90-x)=30

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Solution for x+(90-x)=30 equation:


x+(90-x)=30

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

Remove unnecessary parentheses
+x+90-x=+30

We move all terms containing x to the left and all other terms to the right. 
+1x-1x=+30-90

We simplify left and right side of the equation. 
0x=-60

0=-60

The left and right sides are not equal, therefore there is no solution. This equation is invalid.

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