3x+x=3600

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Solution for 3x+x=3600 equation: 



3x+x=3600

We move all terms to the left:

3x+x-(3600)=0

We add all the numbers together, and all the variables

4x-3600=0

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

4x=3600

x=3600/4

x=900

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