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16x - 57 = 10x + 3 x =

 May 2, 2023
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16x-57=10x+3x

16x-57=13x

3x-57=0

3x=57

x=19

Then, 

16x-57=10x+3x=247

I don't know which answer you wanted, so I just gave both.

 May 2, 2023

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