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2.5x+2.1=1.8+x
We move all terms to the left:
2.5x+2.1-(1.8+x)=0
We add all the numbers together, and all the variables
2.5x-(x+1.8)+2.1=0
We get rid of parentheses
2.5x-x-1.8+2.1=0
We add all the numbers together, and all the variables
1.5x+0.3=0
We move all terms containing x to the left, all other terms to the right
1.5x=-0.3
x=-0.3/1.5
x=-0.3/1.5
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