x.3-20=100

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Solution for x.3-20=100 equation: 



x.3-20=100

We move all terms to the left:

x.3-20-(100)=0

We add all the numbers together, and all the variables

x.3-120=0

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

x.3=120

x=120/1

x=120

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