Question 222360
a) 2p+5q=6
q-p=4 --> q = p+4
Since the 2nd eqn is in terms of q, use substition
2p+5q=6
2p + 5(p+4) = 6
7p+20 = 6
7p=-14
p = -2
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q = +2
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B) -3(g+2c)=-27 --> g+2c = 9 --> 2g+4c = 18
8g-12c=44 --> 2g-3c = 11
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2g+4c = 18
2g-3c = 11
------------  Subtract
0g+7c = 7
c = 1
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g = 7