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21(15-7/2)-7y=-217
We move all terms to the left:
21(15-7/2)-7y-(-217)=0
We add all the numbers together, and all the variables
-7y+21(-7/2+15)-(-217)=0
We add all the numbers together, and all the variables
-7y+217+21(-7/2+15)=0
We multiply parentheses
-7y+217+315-7/2*21=0
We multiply all the terms by the denominator
-7y*2*21-7+217*2*21+315*2*21=0
We add all the numbers together, and all the variables
-7y*2*21+22337=0
Wy multiply elements
-294y*2+22337=0
Wy multiply elements
-588y+22337=0
We move all terms containing y to the left, all other terms to the right
-588y=-22337
y=-22337/-588
y=37+83/84
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