7*7-y=10+21+6*2

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Solution for 7*7-y=10+21+6*2 equation: 



7*7-y=10+21+6*2

We move all terms to the left:

7*7-y-(10+21+6*2)=0

We add all the numbers together, and all the variables

-y+7*7-43=0

We add all the numbers together, and all the variables

-1y+6=0

We move all terms containing y to the left, all other terms to the right

-y=-6

y=-6/-1

y=+6

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