6x+3=7x+21=180

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Solution for 6x+3=7x+21=180 equation: 



6x+3=7x+21=180

We move all terms to the left:

6x+3-(7x+21)=0

We get rid of parentheses

6x-7x-21+3=0

We add all the numbers together, and all the variables

-1x-18=0

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

-x=18

x=18/-1

x=-18

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