3x+4x=9+4

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



3x+4x=9+4

We move all terms to the left:

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

We add all the numbers together, and all the variables

3x+4x-13=0

We add all the numbers together, and all the variables

7x-13=0

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

7x=13

x=13/7

x=1+6/7

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