solve the simultaneous equation
ln(3x-y) = 2ln6 - ln9 and e^2x/e^y = e
thank you :)
ln(3x-y) = 2ln6 - ln9 and e^2x/e^y = e
thank you :)
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ln(3x-y) = 2ln6 - ln9
=> ln(3x-y) = ln6^2 - ln9
=> ln(3x-y) = ln(6^2/9)
=> 3x - y = 36/9 = 4
e^2x/e^y = e
=> e^(2x-y) = e
2x - y = 1 -- (1)
you have 3x - y = 4 -- (2)
(1) - (2) : 2x - 3x = 1 - 4
-x = -3
x = 3
plug in to (1)
2(3) - y = 1
6 - y = 1
y = 5
=> ln(3x-y) = ln6^2 - ln9
=> ln(3x-y) = ln(6^2/9)
=> 3x - y = 36/9 = 4
e^2x/e^y = e
=> e^(2x-y) = e
2x - y = 1 -- (1)
you have 3x - y = 4 -- (2)
(1) - (2) : 2x - 3x = 1 - 4
-x = -3
x = 3
plug in to (1)
2(3) - y = 1
6 - y = 1
y = 5
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3x-y = 4 ......(1)
2x-y = 1 ......(2)
(1)-(2): x = 3, y = 2x-1 = 5
2x-y = 1 ......(2)
(1)-(2): x = 3, y = 2x-1 = 5