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x(4+8)=(9x)+(9x)
We move all terms to the left:
x(4+8)-((9x)+(9x))=0
We add all the numbers together, and all the variables
x12-(+18x)=0
We add all the numbers together, and all the variables
x^12-(+18x)=0
We get rid of parentheses
x^12-18x=0
We do not support expression: x^12
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