Question

Tìm Y :

a) 24 x y + 76 x y = 1000

b) 125 x y - 100 x y = 1000

Answer 1

a) \(24\times y+76\times y=100\)
\(\Rightarrow\left(24+76\right)\times y=100\)
\(\Rightarrow100\times y=100\)
\(\Rightarrow y=100:100\)
\(\Rightarrow y=1\)
b) \(125\times y-100\times y=1000\)
\(\Rightarrow\left(125-100\right)\times y=1000\)
\(\Rightarrow25\times y=1000\)
\(\Rightarrow y=1000:25\)
\(\Rightarrow y=40\)

Answer 2

a)\(=>y=1000:\left(24+76\right)=1000:100=10\)

b(\(=>y=1000:\left(125-100\right)=1000:25=40\)