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x+3=-0.2x+4
We move all terms to the left:
x+3-(-0.2x+4)=0
We get rid of parentheses
x+0.2x-4+3=0
We add all the numbers together, and all the variables
1.2x-1=0
We move all terms containing x to the left, all other terms to the right
1.2x=1
x=1/1.2
x=1/1.2
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