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