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2.9=8+x
We move all terms to the left:
2.9-(8+x)=0
We add all the numbers together, and all the variables
-(x+8)+2.9=0
We get rid of parentheses
-x-8+2.9=0
We add all the numbers together, and all the variables
-1x-5.1=0
We move all terms containing x to the left, all other terms to the right
-x=5.1
x=5.1/-1
x=-5+0.1/1
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