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0.6(x+20)+0.4x=37
We move all terms to the left:
0.6(x+20)+0.4x-(37)=0
We add all the numbers together, and all the variables
0.4x+0.6(x+20)-37=0
We multiply parentheses
0.4x+0.6x+12-37=0
We add all the numbers together, and all the variables
x-25=0
We move all terms containing x to the left, all other terms to the right
x=25
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