7x-30=9x-40+30

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Solution for 7x-30=9x-40+30 equation:



7x-30=9x-40+30
We move all terms to the left:
7x-30-(9x-40+30)=0
We add all the numbers together, and all the variables
7x-(9x-10)-30=0
We get rid of parentheses
7x-9x+10-30=0
We add all the numbers together, and all the variables
-2x-20=0
We move all terms containing x to the left, all other terms to the right
-2x=20
x=20/-2
x=-10

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