Question

Tìm 𝒙, biết:

𝒙 × 18 - 𝒙 × 13 = (285 : 4 - 20,25) × 4

A.

44,5

B.

42,8

C.

39,5

D.

40,8

Answer 1

D

Answer 2

X x 18 - X x 13 = ( 285 : 4 - 20,25 ) x 4

X x ( 18 - 13 ) = 204

X x 5 = 204

X = 204 : 5

X = 40,8

Vậy x = 40,8

Answer 3

D

\(18x-13x=\left(285:4-20,25\right).4\)

⇔\(5x=204\)

⇔\(x=40,8\)