Question

solve the equation 6x+8y=10 and 3x+4y=9 ???
With cross multiplication method
5 min time...

Answer 1

6x+8y/3x+4y=10/9

(6x+8y)*9=(3x+4y)*10

54x+72y=30x+40y

54x-30x+72y-40y=0

24x+32y=0

24x=-32y

x/y= -32/24

x/y=-4/3

x= -4/3y