Question

What is the value
of k if (k,5) is the
Solution of the simultanious equations 4x + 3y = 19
and
4x-3y = -11?​

Answer 1

Step-by-step explanation:

(x,y) = (k,5)

x = k

y = 5

4x + 3y = 19

4k + 3(5) = 19

4k + 15 = 19

4k = 19 - 15

4k = 4

k = 1

4x - 3y = -11

4k - 3(5) = -11

4k - 15 = -11

4k = -11 + 15

4k = 4

k = 1

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Answer 2

(x, y) = (k, 5)

x = k

y = 5

4x + 3y = 19

4k + 3(5) = 19

4k + 15 = 19

4k = 15-19

4k = 4

k = 1

4x - 3y = -11

4k - 3(5) = -11

4k -15 = -11

4k = -11+15

k = 1

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