Question

3x - y = 4
9x - 3y=9​

Answer 1

Answer:

the answer is wrong because you can only add number if the variable is same

Answer 2

Step-by-step explanation:

Substitution method

y=3x−3 [Put in equation 2]

9x−3(3x−3)=9

9x−9x+9=9

∴ ∞ solutions because both lines same

3x−y=3 ……..(1)

3(3x−y)=3×3 ………. (2)

1=2.