Question

Solve with substitution method
3x-y=3,9x-3y=9

Answer 1

Hi mate

here is ur answer


3x-y=3........1
9x-3y=9..(divided by 3)
3x-y=3......2

3x=3-y
X=3-y/3

sub X in 1
3x-y=3
3(3-y/3)-y=3
3-y-y=3
-2y=3-3

y=0

sub y in 2

3x-y=3
3x-0=3
3x=3

X=1

I hope this will help you

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Answer 2

Answer:

There are infinity many solutions of x and y.

Step-by-step explanation:

Given that the equations are 3x - y = 3 and 9x -3y = 9

3x - y = 3 -----(1)

9x -3y = 9 ------(2)

From equation(1)

⇒ 3x - y = 3

⇒ 3x = 3+y

⇒ x = $\frac{3+y}{3}$

Put the x value in equation(2),

⇒ 9x - 3y = 9

⇒ 9($\frac{y+3}{3}$) - 3y = 9

⇒ 3(y+3) - 3y = 9

⇒ 3y + 9 - 3y = 9

⇒0+9 = 9

⇒ 0=0

Therefore, there are infinity many solutions of x and y.

if y = 1

then 3x - 1 =3

3x = 3+1

3x = 4

x = 4/3

And so on.