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4x-2/5=12x-20/5
We move all terms to the left:
4x-2/5-(12x-20/5)=0
We add all the numbers together, and all the variables
4x-(12x-4)-2/5=0
We get rid of parentheses
4x-12x+4-2/5=0
We multiply all the terms by the denominator
4x*5-12x*5-2+4*5=0
We add all the numbers together, and all the variables
4x*5-12x*5+18=0
Wy multiply elements
20x-60x+18=0
We add all the numbers together, and all the variables
-40x+18=0
We move all terms containing x to the left, all other terms to the right
-40x=-18
x=-18/-40
x=9/20
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