Question

3x+2y=4xy,x-3y=-27xy by elination​

Answer 1

Answer:

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Answer 2

3x + 2y = 4xy x - 3y = -27xy

• Divide xy

3/y + 2/x = 4 1/y - 3/x = -27

• Let a = 1/y & b = 1/x

3a + 2b = 4 _(i) a - 3b = -27 _(ii)

• MULTIPLY (ii) by 3

3a + 2b = 4 3a - 9b = -81

• (i) - (ii)

3a + 2b - (3a - 9b) = 4 - (-81)

7b = 85

• b = 85/7

• a = -27 + 255/7 = 66/7

• a = 1/y
• y = 1/a = 7/66

• b = 1/x
• x = 1/b = 7/85