Question

[lê kiều trang]

a, ​​​ ​​0,5/0,7 = -0,1/5.x

b, 1,2/x+3 = 5/4 

Answer 1

[HOANG TRUONG GIANG]

\(\frac{0,5}{0,7}\)=\(\frac{-0.1}{5.x}\)

→(0,5).5.x=-0,07

2,5.x=0,07

x=0,028

\(\frac{1,2}{x+3}\)=\(\frac{5}{4}\)

→5x+15=4,8

5x=-10,2

x=-2.04