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5.7x-3=-10x+2.1
We move all terms to the left:
5.7x-3-(-10x+2.1)=0
We get rid of parentheses
5.7x+10x-2.1-3=0
We add all the numbers together, and all the variables
15.7x-5.1=0
We move all terms containing x to the left, all other terms to the right
15.7x=5.1
x=5.1/15.7
x=1/3.078431372549
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