3x-20+5x-10=90

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Solution for 3x-20+5x-10=90 equation: 



3x-20+5x-10=90

We move all terms to the left:

3x-20+5x-10-(90)=0

We add all the numbers together, and all the variables

8x-120=0

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

8x=120

x=120/8

x=15

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