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400/70=x
We move all terms to the left:
400/70-(x)=0
We add all the numbers together, and all the variables
-1x+400/70=0
We multiply all the terms by the denominator
-1x*70+400=0
Wy multiply elements
-70x+400=0
We move all terms containing x to the left, all other terms to the right
-70x=-400
x=-400/-70
x=5+5/7
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