Asked by manikandan

using cross multiplication method solve 3x+5y=25 , 7x+6y=30
Answered by collins
huh? do you mean solving by matrix crammers rule?
Answered by Damon
Maybe means multiply first one by 7 and second one by 3 ?

I doubt if they have gotten to Cramer or Gauss Jordan.

21 x + 35 y = 175
21 x + 18 y = 90
---------------------subtract
0 x + 17 y = 85
y = 5
then x = 0