3x+15-7x=45

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Solution for 3x+15-7x=45 equation: 



3x+15-7x=45

We move all terms to the left:

3x+15-7x-(45)=0

We add all the numbers together, and all the variables

-4x-30=0

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

-4x=30

x=30/-4

x=-7+1/2

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