12.5x+x=100

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Solution for 12.5x+x=100 equation: 



12.5x+x=100

We move all terms to the left:

12.5x+x-(100)=0

We add all the numbers together, and all the variables

13.5x-100=0

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

13.5x=100

x=100/13.5

x=7+3.6666666666667/9

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