Question

For which values of a and b does the following pair of linear equations has infinite number of solutions?
2x-3y=7
ax+3y=b

Answer 1

pain of eq.. has infinite solution if
a1/a2=b1/b2=c1/c2
now 2/a=-3/3
2/a=-1
""a=-2""
-3/3=7/b
7/b=-1
b=-7

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