(3*x)+x=100

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Solution for (3*x)+x=100 equation: 



(3x)+x=100

We move all terms to the left:

(3x)+x-(100)=0

We add all the numbers together, and all the variables

4x-100=0

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

4x=100

x=100/4

x=25

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