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200/21=7x
We move all terms to the left:
200/21-(7x)=0
We multiply all the terms by the denominator
-7x*21+200=0
Wy multiply elements
-147x+200=0
We move all terms containing x to the left, all other terms to the right
-147x=-200
x=-200/-147
x=1+53/147
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