Question

Tìm x: (dễ thôi mà)

15 - x/23 = x - 14/15

 

 

Answer 1

\(\frac{15-x}{23}=\frac{x-14}{15}\)

=> (15 - x).15 = 23.(x - 14)

=> 225 - 15x = 23x - 322

=> 225 + 322 = 23x + 15x

=> 547 = 38x

=> x = 547/38

Answer 2

\(\frac{15-x}{23}=\frac{x-14}{15}\)

\(\Rightarrow\left(15-x\right).15=23.\left(x-14\right)\)

\(\Rightarrow225-15x=23x-322\)

\(\Rightarrow225+322=23x+15x\)

\(\Rightarrow547=38x\)

\(\Rightarrow x=547:38\)

\(\Rightarrow x=...\)