yX(-2)=28

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Solution for yX(-2)=28 equation: 



yy(-2)=28

We move all terms to the left:

yy(-2)-(28)=0

We multiply parentheses

-2y-28=0

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

-2y=28

y=28/-2

y=-14

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