--30=90

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Solution for --30=90 equation:


--30=90

We simplify the equation to the form, which is simple to understand 
+30=90

We move all terms containing  to the left and all other terms to the right. 
0=+90-30

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

0=60

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

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