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y+10=2y-6.9
We move all terms to the left:
y+10-(2y-6.9)=0
We get rid of parentheses
y-2y+6.9+10=0
We add all the numbers together, and all the variables
-1y+16.9=0
We move all terms containing y to the left, all other terms to the right
-y=-16.9
y=-16.9/-1
y=16+0.9/1
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