Question

find the value of k for which the system of equation has a unique solution 2 x+5 y=7, 3x+4y=K​

Answer 1

Step-by-step explanation:

3×(2x+5y)= 21 & 2×(3x+4y)=2k

6x + 15y = 21. & 6x + 8y ,= 2k

15y - 8y = 21 - 2k so y = (21 - 2k ) / 7

put the value of y in 1st equation

2x + 5×(21 - 2k)/7 = 7

2x+ (101 - 10k)/7 = 7

14x+101 - 10k = 49 so 10k - 14x = 52

x =( 10k - 52) / 14

put the value of x & y in 2nd equation

and you will find the value of "k"

I hope it will help ful for u

Answer 2

Answer:

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Step-by-step explanation:

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i hope it may help u.....