Respuesta :

X=12
Hope this helps
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Answer:

x=75/4 or x=18.75

Step-by-step explanation:

(2x+3)2=81

2(2x+3)=81

4x+6=81

-6 -6

4x= 75

4x/4 = 75/4

x= 75/4 or x= 18.75