1).

4xy − 1 = x^2 + y^3; x^2 + y^3 - 4xy = −1

4xy + 4 = 3x + 2y; 3x − 4xy + 2y = 4

x^2 + y^3 - 4xy = −1

3x − 4xy + 2y = 4

Real solution:

x ≈ 0.733123, y ≈ -1.93099

2).

8xy − 1 = 3x + 2y ; 3x − 8xy + 2y = −1

12xy − 3 = 3x + 2y ; 3x − 12xy + 2y = −3

Complex solutions:

x ≈ 0.5 - 0.288675 i, y ≈ 0.75 + 0.433013 i

x ≈ 0.5 + 0.288675 i, y ≈ 0.75 - 0.433013 i

3).

20xy − 5 = 3x + 2y ; 3x − 20xy + 2y = −5

24xy − 6 = 3x + 2y ; 3x - 24xy + 2y = -6

Complex solutions:

x ≈ -0.408248 i, y ≈ 0.612372 i

x ≈ 0.408248 i, y ≈ -0.612372 i

Gibberish !!! Next time, include the instructions.

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