Question

Solve the pair of equation by cross multiplication method
8x+5y=9,3x+2y=4

Answer 1

Answer:

Given, pair of equations is 8x+5y−9=0 and 3x+2y−4=0

By cross-multiplication method, we have

⇒ −20+18/x = −27+32/y= 16−15/1

⇒ −2/x = 5/y= 1/1

I II III

On taking I and III ratio, we get

⇒ −2/x = 1/1

⇒x=−2

On taking II and III ratio, we get

⇒ 5/y = 1/1

⇒y=5

•°• x=-2 and y=5