Respuesta :

Mibo

Step-by-step explanation:

The answer is 10

First calculate one side the answer is 70 now you have to find such a number that when you multiply it both sides are equal

(7) × 10 = (5 ×_) + 20

70 = (5 × 10) + 20

70 = 50 +20

70 = 70

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