X=300-4x

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Solution for X=300-4x equation: 



X=300-4X

We move all terms to the left:

X-(300-4X)=0

We add all the numbers together, and all the variables

X-(-4X+300)=0

We get rid of parentheses

X+4X-300=0

We add all the numbers together, and all the variables

5X-300=0

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

5X=300

X=300/5

X=60

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