7x+2x-5=20-x

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Solution for 7x+2x-5=20-x equation: 



7x+2x-5=20-x

We move all terms to the left:

7x+2x-5-(20-x)=0

We add all the numbers together, and all the variables

7x+2x-(-1x+20)-5=0

We add all the numbers together, and all the variables

9x-(-1x+20)-5=0

We get rid of parentheses

9x+1x-20-5=0

We add all the numbers together, and all the variables

10x-25=0

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

10x=25

x=25/10

x=2+1/2

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