7x+2x+3x=100

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Solution for 7x+2x+3x=100 equation: 



7x+2x+3x=100

We move all terms to the left:

7x+2x+3x-(100)=0

We add all the numbers together, and all the variables

12x-100=0

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

12x=100

x=100/12

x=8+1/3

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