Respuesta :

Pramerios
We'll use n as "the number". 2n+3=1/2n+12. Step one is to isolate the variable.
2n-1/2n is 1.5n.
1.5n+3=12.
Subtract 3 from both sides.
1.5n=9.
n=6.

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Sofiadecredico
first we have to make an equation

2x+3=1/2x+12

then solve

15=-1.5x
 -10=x

the number is -10

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