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2(2x*30)/4=20
We move all terms to the left:
2(2x*30)/4-(20)=0
We add all the numbers together, and all the variables
2(+2x*30)/4-20=0
We multiply all the terms by the denominator
2(+2x*30)-20*4=0
We add all the numbers together, and all the variables
2(+2x*30)-80=0
We multiply parentheses
120x-80=0
We move all terms containing x to the left, all other terms to the right
120x=80
x=80/120
x=2/3
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