Question

3x-y=3,9x-3y=9 by substitution method​

Answer 1

Answer:

3x – y = 3 and 9x – 3y = 9 are the two equations.

From 1st equation, we get,

x = (3+y)/3

Now, substitute the value of x in the given second equation to get,

9(3+y)/3 – 3y = 9

⇒9 + 3y – 3y = 9

⇒ 9 = 9

Therefore, y has infinite values and since, x = (3+y) /3, so x also has infinite values.

Answer 2

Answer:

x ∈ R

Step-by-step explanation:

make y subject of the formula in the first equation:

y= (3-3x)/-1

substitute y with what y has been equated to and solve from there:

THE VALUE OF X IS IN PARAMETRIC FORM (it is independent/infinite)