y = 9 + 3z
y - 3z = 9
y = 65 - 5z
y + 5z = 65 ( 1)
y - 3z = 9 ( 2)
Subtracting equating 1 and 2
8z = 56
Z = 7
y = 9 + 3z
y = 9 + 3 x 7
y = 30
Value of z = 7
Value of Y = 30
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4a + 2b = 20 ( 1)
15a + 5b = 60 ( 2)
Multiplying equating 1 by 3.75
15a + 7.5b = 75 (3)
15a + 5b = 60 (4)
Subtracting equating 3 from 4
we get
2.5b = 15
b = 6
4a + 2b = 20
4a = 20 - 2b
4a = 20 - 2 x 6
4a = 8
a = 2
Value of a = 2
Value of b = 6
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p = 6 - 2q
p = 4 + q
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