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7x-28/20-5x=0
We add all the numbers together, and all the variables
2x-28/20=0
We multiply all the terms by the denominator
2x*20-28=0
Wy multiply elements
40x-28=0
We move all terms containing x to the left, all other terms to the right
40x=28
x=28/40
x=7/10
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