Can the following equations hold simultaneously?

3x - 7y = 7

11x + 5y = 87

5x + 4y = 43.

If so, find x and y.

Solve the following systems of simultaneous linear equations by cross-multiplication method :

3x + 2y = 4

8x + 5y = 9

Solve the following system of simultaneous linear equations by cross - multiplication method :

2x - 5y = -1

3x + y = 7

Solve the following system of simultaneous linear equations by cross-multiplication method :

x + 3y + 4 = 0

3x - y = -2