100-10x=30

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Solution for 100-10x=30 equation: 



100-10x=30

We move all terms to the left:

100-10x-(30)=0

We add all the numbers together, and all the variables

-10x+70=0

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

-10x=-70

x=-70/-10

x=+7

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