2x-3=7x+21=90

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Solution for 2x-3=7x+21=90 equation: 



2x-3=7x+21=90

We move all terms to the left:

2x-3-(7x+21)=0

We get rid of parentheses

2x-7x-21-3=0

We add all the numbers together, and all the variables

-5x-24=0

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

-5x=24

x=24/-5

x=-4+4/5

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