-7x+9+3x=49

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Solution for -7x+9+3x=49 equation: 



-7x+9+3x=49

We move all terms to the left:

-7x+9+3x-(49)=0

We add all the numbers together, and all the variables

-4x-40=0

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

-4x=40

x=40/-4

x=-10

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