100=0.03x+0.04x

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Solution for 100=0.03x+0.04x equation: 



100=0.03x+0.04x

We move all terms to the left:

100-(0.03x+0.04x)=0

We add all the numbers together, and all the variables

-(+0.07x)+100=0

We get rid of parentheses

-0.07x+100=0

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

-0.07x=-100

x=-100/-0.07

x=1428+0.039999999999992/0.07

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