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x=1/2(2x-30+30)
We simplify the equation to the form, which is simple to understand
x=1/2(2x-30+30)
Reorder the terms in parentheses
x=+(+1x)
Remove unnecessary parentheses
+x=0+1x
We move all terms containing x to the left and all other terms to the right.
+1x-1x=0
We simplify left and right side of the equation.
0x=0
0=0
This equation is an identity, so all real numbers are solutions.
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