y(-4+8)-7=21

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Solution for y(-4+8)-7=21 equation: 



y(-4+8)-7=21

We move all terms to the left:

y(-4+8)-7-(21)=0

We add all the numbers together, and all the variables

y4-7-21=0

We add all the numbers together, and all the variables

y^4-28=0

We do not support eypression: y^4

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