3x+15+4x=9x-15

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Solution for 3x+15+4x=9x-15 equation: 



3x+15+4x=9x-15

We move all terms to the left:

3x+15+4x-(9x-15)=0

We add all the numbers together, and all the variables

7x-(9x-15)+15=0

We get rid of parentheses

7x-9x+15+15=0

We add all the numbers together, and all the variables

-2x+30=0

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

-2x=-30

x=-30/-2

x=+15

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