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1.2x+3=x-1.8
We move all terms to the left:
1.2x+3-(x-1.8)=0
We get rid of parentheses
1.2x-x+1.8+3=0
We add all the numbers together, and all the variables
0.2x+4.8=0
We move all terms containing x to the left, all other terms to the right
0.2x=-4.8
x=-4.8/0.2
x=-23+0.2/0.2
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