Question

This is from simultaneous linear equations you can use any method. THANK YOU

Answer 1

Answer:

-20    ;    17

Step-by-step explanation:

2p + q = 23 ------- (i)

4p - q = 19 ------- (ii)

Add (i) and (ii)

2p + q + 4p - q = 23 + 19

6p = 42

p = 42/6

p = 7

4p - q = 19

4(7) - q = 19

28 - q = 19

q = 28 - 19

q = 9

Now,

p - 3q

7 - 3(9)

7 - 27

-20

5p - 2q

5(7) - 2(9)

35 - 18

17

Answer 2

Step-by-step explanation:

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