15+3x=20-x

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Solution for 15+3x=20-x equation: 



15+3x=20-x

We move all terms to the left:

15+3x-(20-x)=0

We add all the numbers together, and all the variables

3x-(-1x+20)+15=0

We get rid of parentheses

3x+1x-20+15=0

We add all the numbers together, and all the variables

4x-5=0

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

4x=5

x=5/4

x=1+1/4

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