124-x=3x

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Solution for 124-x=3x equation: 



124-x=3x

We move all terms to the left:

124-x-(3x)=0

We add all the numbers together, and all the variables

-4x+124=0

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

-4x=-124

x=-124/-4

x=+31

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