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(420)6/18=x
We move all terms to the left:
(420)6/18-(x)=0
We add all the numbers together, and all the variables
-1x+4206/18=0
We multiply all the terms by the denominator
-1x*18+4206=0
Wy multiply elements
-18x+4206=0
We move all terms containing x to the left, all other terms to the right
-18x=-4206
x=-4206/-18
x=233+2/3
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