x+(-21)=80

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Solution for x+(-21)=80 equation: 



x+(-21)=80

We move all terms to the left:

x+(-21)-(80)=0

determiningTheFunctionDomain
x-80+(-21)=0

We add all the numbers together, and all the variables

x-101=0

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

x=101

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