hey i have yet another maths question...:( i tried looking for the solution but the site for the exam papers is down. the question is solve:

for x and y

x + y = 7

x^2+y^2=29

the answer is (2,5) and (5,2) but i got (10,0) and (0,10)

i have ALOT of difficulty with these sums so i would be really grateful for the solution to do it , thanks

then it asks in part (2) " which one of the values of y in the above satisfies the inequality 6-2y<0