0.7x+x=100

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Solution for 0.7x+x=100 equation: 



0.7x+x=100

We move all terms to the left:

0.7x+x-(100)=0

We add all the numbers together, and all the variables

1.7x-100=0

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

1.7x=100

x=100/1.7

x=58+1/1.2142857142857

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