10x+3x-9=30

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Solution for 10x+3x-9=30 equation: 



10x+3x-9=30

We move all terms to the left:

10x+3x-9-(30)=0

We add all the numbers together, and all the variables

13x-39=0

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

13x=39

x=39/13

x=3

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