300+3x=500+x

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Solution for 300+3x=500+x equation: 



300+3x=500+x

We move all terms to the left:

300+3x-(500+x)=0

We add all the numbers together, and all the variables

3x-(x+500)+300=0

We get rid of parentheses

3x-x-500+300=0

We add all the numbers together, and all the variables

2x-200=0

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

2x=200

x=200/2

x=100

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