Question: Solve for X and Y in the following problems. Make sure you show all your work so you can get partial credit even if your final answer is wrong.

a. \(x+y=7\), \(x+2y=11\)

b. \(3x+7y=24,\,\,9x+5y=24\)

c. \(4x+y=17,\,\,2x+3y=21\)

d. \(18x+y=42,\,\,\,6x-3y=-6\)