How do I find the solutions to 2 graph equations and how do I solve these 2 fraction division problems?

15. What is the solution to the system of equations x^2-x + 6 = y and 2x+2y = 36?

A. (0, 6), (9, 9)

B. (2, square root of 3, 18-2 square root of 3),(-2square root of 3, 18 + square root of 3)

C. an infinite number of solutions

D. no solution

23.((x^2)-x)/((X^2)+3x+2) divided by ((x^2)+(2x))/((X^2)-1) =

A.(X^2)/((2x^2)+2x+1)

B. 1

C.((x^2)-1)/((x^2)-4)

D. ((x^2)-2x+1)/((x^2)+4x+4)

25. ((a^2/3)(b^3)c^5)/((a^2)(b^1/3)) divided by (a^2)(b^1/5)(d^1/2)

A. (a^2/3)(b^13/3)(c^5)(d^1/2)

B. (a^6)(b^6)(c^5)/(d^1/2)

C. (a^1/3)(b^13/2)(c^5)/(d^1/2)

D. bc^5/(a^1/5)(d^1/12)

These questions are from this page: http://www.thea.nesinc.com/practice.htm. I think it's easier to read there.