Question

cross multiplication method x-7y=-42, x-3y=6​

Answer 1

Step-by-step explanation:

x-7y=42

x-3y=6

x-7y-42=0

x-3y-6=0

by cross multiplication

x/-7*-6-3*-42 = y/-42*6-(-6)*1 =1/1*1-1*-7

x/168 = y/-36 = 1/8

x=168/8= 21

y=-36/8= 4.5

I hope that it will help you