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x=1.90x+12.20
We move all terms to the left:
x-(1.90x+12.20)=0
We add all the numbers together, and all the variables
x-(1.90x+12.2)=0
We get rid of parentheses
x-1.90x-12.2=0
We add all the numbers together, and all the variables
-0.9x-12.2=0
We move all terms containing x to the left, all other terms to the right
-0.9x=12.2
x=12.2/-0.9
x=-13+0.5/0.9
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