7x-20=6x-1=90

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Solution for 7x-20=6x-1=90 equation: 



7x-20=6x-1=90

We move all terms to the left:

7x-20-(6x-1)=0

We get rid of parentheses

7x-6x+1-20=0

We add all the numbers together, and all the variables

x-19=0

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

x=19

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