Question

[Nguyễn Bá Tú]

x + 4 * x - 2 * x = 54 -30

Answer 1

[Dương Đức Hiệp]

x+ 4 * x - 2 *x = 24

x  * ( 4-2+ 1 ) = 24

x * 3 = 24

x = 24 : 3

x = 8

Answer 2

[An Hoà]

x + 4 * x - 2 * x = 54 - 30

x * ( 1 + 4 - 2 )  =24

x * 3                 =24

x                      =8