12x-30+8x+20=90

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Solution for 12x-30+8x+20=90 equation: 



12x-30+8x+20=90

We move all terms to the left:

12x-30+8x+20-(90)=0

We add all the numbers together, and all the variables

20x-100=0

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

20x=100

x=100/20

x=5

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