15-28=Xx2

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Solution for 15-28=Xx2 equation: 



15-28=XX2

We move all terms to the left:

15-28-(XX2)=0

We add all the numbers together, and all the variables

-XX2-13=0

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

-XX2=13

X=13/1

X=13

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