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3.7x-0.9=4.2+1.2x
We move all terms to the left:
3.7x-0.9-(4.2+1.2x)=0
We add all the numbers together, and all the variables
3.7x-(1.2x+4.2)-0.9=0
We get rid of parentheses
3.7x-1.2x-4.2-0.9=0
We add all the numbers together, and all the variables
2.5x-5.1=0
We move all terms containing x to the left, all other terms to the right
2.5x=5.1
x=5.1/2.5
x=2+0.1/2.5
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