90x=80x+1000

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Solution for 90x=80x+1000 equation: 



90x=80x+1000

We move all terms to the left:

90x-(80x+1000)=0

We get rid of parentheses

90x-80x-1000=0

We add all the numbers together, and all the variables

10x-1000=0

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

10x=1000

x=1000/10

x=100

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