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15x+9=9+25x
We move all terms to the left:
15x+9-(9+25x)=0
We add all the numbers together, and all the variables
15x-(25x+9)+9=0
We get rid of parentheses
15x-25x-9+9=0
We add all the numbers together, and all the variables
-10x=0
x=0/-10
x=0
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