Question

3x-y=3,9x-3y=9​ elemination method

Answer 1

3x-y=3,

9x-3y=9

by dividing 2nd equation with three we get,

3x-y=3

so the answer is infinite

answer=infinite

Answer 2

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

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

solving by elimination methods

multiply equation (1) by 3 to make coefficients of (x) equal

so,

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

now subtracting equation (2) from equation (3)

9x-3y=9

9x-3y=9

- + - (signs Changed)

each term here gets cancelled means these equations are of coincident lines and it has infinite solutions.