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0.3X+0.4=0.28X=38X
We move all terms to the left:
0.3X+0.4-(0.28X)=0
We add all the numbers together, and all the variables
0.3X-(+0.28X)+0.4=0
We get rid of parentheses
0.3X-0.28X+0.4=0
We add all the numbers together, and all the variables
0.02X+0.4=0
We move all terms containing X to the left, all other terms to the right
0.02X=-0.4
X=-0.4/0.02
X=-20
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