2p+q=56;2p-q=11 eliminating method
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1
2p+q = 56 ===> eqn 1
2p-q = 11 ===> eqn 2
change the signs only of equation 2
- + -
2q = 45
q = 45 / 2
q = 22.5
q value substitute in equation 2
2p-q = 11
2p - 22.5 = 11
2p =11 + 22.5
2p = 33.5
p = 33.5 × 2
p = 335 / 10 × 2
p = 335 / 5
p = 67
2p-q = 11 ===> eqn 2
change the signs only of equation 2
- + -
2q = 45
q = 45 / 2
q = 22.5
q value substitute in equation 2
2p-q = 11
2p - 22.5 = 11
2p =11 + 22.5
2p = 33.5
p = 33.5 × 2
p = 335 / 10 × 2
p = 335 / 5
p = 67
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Answered by
1
Answer:
p=16.75
q=322.5
Step-by-step explanation:
2p+q=56
2p-q=11
--------------
4p=67
p=16.75
q=56-2(16.75)=56-33.5=22.5
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