Question

By Elimination, 3x-y=3 and 9x-3y=9​

Answer 1

3x-y=3_____Equation 1

9x-3y=9_____Equation 2

3x-3=y ___Equation 3

Put y in Equation 2

9x-3y=9

9x-3 (3x-3)=9

9x-9x+9=9

9x-9x=9-9

x=0

Equation 3

3x-3=y

3(0)-3=y

0-3=y

-3=y

Verification

1 ) 3(0)-(-3)=3

2)9(0)-3(-3)=9