Respuesta :

Let x be the number of tacos sold if he sells 63 burritos

7 burritos = 9 tacos

63 burritos = x

cross-multiply

7x = 9 times 63

7x =567

Divide both-side of the equation by 7

7x/7 = 567/7

x= 81

Therefore; he sold 81 tacos

RELAXING NOICE
Relax