20+2x-5=9x+21

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Solution for 20+2x-5=9x+21 equation: 



20+2x-5=9x+21

We move all terms to the left:

20+2x-5-(9x+21)=0

We add all the numbers together, and all the variables

2x-(9x+21)+15=0

We get rid of parentheses

2x-9x-21+15=0

We add all the numbers together, and all the variables

-7x-6=0

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

-7x=6

x=6/-7

x=-6/7

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