7x-120=9x-340

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Solution for 7x-120=9x-340 equation: 



7x-120=9x-340

We move all terms to the left:

7x-120-(9x-340)=0

We get rid of parentheses

7x-9x+340-120=0

We add all the numbers together, and all the variables

-2x+220=0

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

-2x=-220

x=-220/-2

x=+110

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