11+xX2=21

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Solution for 11+xX2=21 equation: 



11+xx2=21

We move all terms to the left:

11+xx2-(21)=0

We add all the numbers together, and all the variables

xx2-10=0

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

xx2=10

x=10/1

x=10

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