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X=72+0.7X
We move all terms to the left:
X-(72+0.7X)=0
We add all the numbers together, and all the variables
X-(0.7X+72)=0
We get rid of parentheses
X-0.7X-72=0
We add all the numbers together, and all the variables
0.3X-72=0
We move all terms containing X to the left, all other terms to the right
0.3X=72
X=72/0.3
X=240
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