3x+x-3=42-x

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Solution for 3x+x-3=42-x equation:



3x+x-3=42-x
We move all terms to the left:
3x+x-3-(42-x)=0
We add all the numbers together, and all the variables
3x+x-(-1x+42)-3=0
We add all the numbers together, and all the variables
4x-(-1x+42)-3=0
We get rid of parentheses
4x+1x-42-3=0
We add all the numbers together, and all the variables
5x-45=0
We move all terms containing x to the left, all other terms to the right
5x=45
x=45/5
x=9

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