Question

Tìm x, biết: \(\frac{9+x}{13-x}=\frac{5}{6}\)

Answer 1

\(\frac{9+x}{13-x}=\frac{5}{6}\)

=> (9 + x).6 = 5.(13 - x)

=> 54 + 6x = 65 - 5x

=> 6x + 5x = 65 - 54

=> 11x = 9

=> x = 9/11

Answer 2

x=1 nha bạn

Answer 3

\(\frac{9+x}{13-x}=\frac{5}{6}\)

\(\left(9+x\right)\times6=\left(13-x\right)\times5\)

\(54+6\times x=65-5\times x\)

\(6\times x+5\times x=65-54\)

\(11\times x=11\)

\(x=1\)