Question

elimination method x-7y+42=0 and x-3y=6​

Answer 1

Answer:

x-7y+42=0

x-3y-6=0

subtracting,

-7y+3y+42+6=0

=> -4y= -48

=> y= -48/-4

=> y=12

putting the value of y in the 1st equation,

x-7.12+42=0

=> x-84+42=0

=> x-42=0

=> x=42

so, x=42 , y =12