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Question

For what values of k the set of equations 2x3y+6z5t=3, y4z+t=1, 4x5y+8z9T=k has infinite number of solutions

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Solution

Given a system of equations has infinitely many solutions

2x3y+6z5t=3 ....(1)
y4z+t=1 .....(2)
4x5y+8z9T=k ....(3)
Subtracting (2) from (3), we get

4x6y+12z10t=k1

2x3y+6z5t=k12 .....(4)
From (1) and (4), we get
k12=3

k=7

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