Question

determine os valores desconhecido​

Answer 1

5x + 3 + 12x + 2 = 90

17x + 5 =90

17x = 90 - 5

17x = 85

x= 85/17

x= 5

12x +2+y=90

12*5 +2+y =90

60+2+y =90

y = 90 - 60 - 2

y = 28