Question

ìm y 

40 x y trừ y bằng 1950 chia 25

giups nhen

Answer 1

\(40\times y-y=1950:25\\ \Rightarrow\left(40-1\right)\times y=78\\ \Rightarrow39\times y=78\\ \Rightarrow y=78:39\\ \Rightarrow y=2\)