5x-2x+9=45

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Solution for 5x-2x+9=45 equation: 



5x-2x+9=45

We move all terms to the left:

5x-2x+9-(45)=0

We add all the numbers together, and all the variables

3x-36=0

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

3x=36

x=36/3

x=12

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