Question

[123]

Tìm x :

\(x\times\frac{1}{4}+x\times\frac{1}{5}+x\times2=19,6\)

Answer 1

[Nguyễn Hương Giang]

x . 1/4 + x . 1/5 + x . 2 = 19,6

x . ( 1/4 + 1/5 + 2 ) = 19,6

x . 49/20 = 19,6

x = 19,6 : 49/20

x = 8