8x+7x-30=120

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Solution for 8x+7x-30=120 equation: 



8x+7x-30=120

We move all terms to the left:

8x+7x-30-(120)=0

We add all the numbers together, and all the variables

15x-150=0

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

15x=150

x=150/15

x=10

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