Question

find the value of aand b which the pair of linear eq x +ay=b-4 and 2x + (a+3)y=b has infinitely many solution

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Answer 1

$\frac{1}{2 } = \frac{a}{a + 3} = \frac{b - 4}{b}$

2a =a+3

a=3

2b-8=b

b=8