x+2*2x=100

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Solution for x+2*2x=100 equation: 



x+2*2x=100

We move all terms to the left:

x+2*2x-(100)=0

Wy multiply elements

x+4x-100=0

We add all the numbers together, and all the variables

5x-100=0

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

5x=100

x=100/5

x=20

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