using cross multiplication method solve 3x+5y=25 , 7x+6y=30
2 answers
huh? do you mean solving by matrix crammers rule?
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
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
1 answer