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x+2=-0.8x+2.8
We move all terms to the left:
x+2-(-0.8x+2.8)=0
We get rid of parentheses
x+0.8x-2.8+2=0
We add all the numbers together, and all the variables
1.8x-0.8=0
We move all terms containing x to the left, all other terms to the right
1.8x=0.8
x=0.8/1.8
x=0.8/1.8
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