X+3x+x+5=20

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Solution for X+3x+x+5=20 equation: 



X+3X+X+5=20

We move all terms to the left:

X+3X+X+5-(20)=0

We add all the numbers together, and all the variables

5X-15=0

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

5X=15

X=15/5

X=3

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