Question

Qual o valor de x em reais?
a)75
b)80
c)90
d)100
e)105​

Answer 1

Resposta:

x - x/3 - 10 - (x - x/3 -10) . 4/5 = 12

x - x/3 - 10 - (4/5)x + (4/15)x + 8 = 12

x - x/3 - 2 - (4/5)x + (4/15)x = 12

x - x/3 - (4/5)x + (4/15)x = 14

15x - 5x - 12x + 4x = 210

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15

2x = 210

x = 105