18=100-4x

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Solution for 18=100-4x equation: 



18=100-4x

We move all terms to the left:

18-(100-4x)=0

We add all the numbers together, and all the variables

-(-4x+100)+18=0

We get rid of parentheses

4x-100+18=0

We add all the numbers together, and all the variables

4x-82=0

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

4x=82

x=82/4

x=20+1/2

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