30x-90=180

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Solution for 30x-90=180 equation: 



30x-90=180

We move all terms to the left:

30x-90-(180)=0

We add all the numbers together, and all the variables

30x-270=0

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

30x=270

x=270/30

x=9

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