40=23-9x

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Solution for 40=23-9x equation: 



40=23-9x

We move all terms to the left:

40-(23-9x)=0

We add all the numbers together, and all the variables

-(-9x+23)+40=0

We get rid of parentheses

9x-23+40=0

We add all the numbers together, and all the variables

9x+17=0

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

9x=-17

x=-17/9

x=-1+8/9

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