Question

Tìm x \(\in\)N biết : 96 - 3 ( x + 1 ) = 42 

Answer 1

96 - 3 ( x + 1 ) = 42

3(x+1)=96-42=54

x+1=54:3=18

x=18-1=17

Vậy x=17

Answer 2

96 - 3 ( x + 1 ) = 42

3 ( x + 1 ) = 96 - 42 = 54

x + 1 = 54 : 3 = 18

x = 18 - 1 = 17