Question

3х - у = 3
9x - Зу = 9
By substitution

Answer 1

Answer:

3x-y=3

9x-3y=9

from eq1

3x-3=y

substituting value of y in eq2

9x-9x+9=9

therefore this pair of linear equations has infinite solutions because

a1/à2 = b1/b2 = c1/c2

Answer 2

3x - y = 3 (1)

9x - 3y = 9 (2)

from 1

y = 3x - 3

put y in 2

9x - 3y = 9

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

9x - 9x + 9 = 9

= 0

therfore this kind of equation has infinitely many solution because

a1/a2 = b1/b2 = c1/c2

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