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42/15=2x
We move all terms to the left:
42/15-(2x)=0
We multiply all the terms by the denominator
-2x*15+42=0
Wy multiply elements
-30x+42=0
We move all terms containing x to the left, all other terms to the right
-30x=-42
x=-42/-30
x=1+2/5
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