Question

plx answer the 19th and 20th it is urgent plz

Answer 1

19)
$x - 2y = k \\ 1 - 2( - 3) = k \\ k = 1 + 6 = 7$
20)
$2x - y = 4 \\ 2(2k - 2) - (k + 1) = 4 \\ 3k - 5 = 4 \\ 3k = 9 \\ k = 3$
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Answer 2

(19) x-2y = k

( 1; -3)

so here x = 1 and y = -3

so putting their values

1 + 9 = k

10 = k

(20) . 2( 2k -2) -k -1 = 4


4k -4 -k - 1. = 4

3k = 9
k = 3


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