Question

( X - 20 ) x 8 - 15 = 49

Answer 1

( X - 20 ) × 8 - 15 = 49

( X - 20 ) × 8 = 49 + 15

(  X - 20 ) × 8 = 64

X - 20 = 64 : 8

X - 20 = 8

X = 8 + 20

X = 28

Vậy X = 28

Answer 2

( X -20 ) x 8 - 15 = 49

( X - 20 ) x 8       = 49 + 15

( X - 20 ) x 8       = 64

( X - 20 )            = 64 : 8

 X - 20               = 8

X                       = 8 + 20

X                       = 28

Answer 3

( X - 20 ) × 8 - 15 = 49

( X - 20 ) × 8 = 49 + 15

(  X - 20 ) × 8 = 64

X - 20 = 64 : 8

X - 20 = 8

X = 8 + 20

X = 28

Vậy X = 28