Question

[Nguyen Van Binh]

Tìm x:

a) x * 2 + x * 3 = 60

b) x * 15 – x * 9 = 78 

Answer 1

[Mineru]

a) x * 2 + x * 3 = 60

x * ( 2 + 3 ) = 60

x = 60 : 5

x = 12

b) x * 15 - x * 9 = 78

x * ( 15 - 9 ) = 78

x = 78 : 6

x = 13