Respuesta :

Answer:

23.

Step-by-step explanation:

5x + 20 = 3x + 66

Subtract 20 from both sides and  3x from both sides

5x - 3x  + 20  - 20 = 3x  - 3x + 66 - 20

5x - 3x = 66 - 20

2x = 46

x = 23.

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