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7x+23=5-2x

We move all terms to the left:

7x+23-(5-2x)=0

We add all the numbers together, and all the variables

7x-(-2x+5)+23=0

We get rid of parentheses

7x+2x-5+23=0

We add all the numbers together, and all the variables

9x+18=0

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

9x=-18

x=-18/9

x=-2

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