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1.3x-0.7=-2x
We move all terms to the left:
1.3x-0.7-(-2x)=0
We get rid of parentheses
1.3x+2x-0.7=0
We add all the numbers together, and all the variables
3.3x-0.7=0
We move all terms containing x to the left, all other terms to the right
3.3x=0.7
x=0.7/3.3
x=0.7/3.3
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