Question

By Substitution Method
3x - y = 3
9x - 3y = 9
solve it​

Answer 1

Answer:

infinitly many solutions

Explanation:

3x-y=3

y=3x-3

Now substitute value of y on eq 2 we have,

9x-3y=9

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

9x-3x+9=9

6x=0

so

it has infinity many solutions

Answer 2

Answer:

3x-y=3 (i)

9x-3y=9. (ii)

equation (I)

3x-y=3

so: 3x=3+y

=x=3+y/3 (iii)

after putting the value of x in equation (ii)

9x-3y=9

so: 9×3+y/3-3y=9

or 27+y-3y=27

or 27+2y=27

or 2y =27-27

or y =0

put the value of y in equation 1 and solve it

Explanation:

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