7p + 2 = 5p + 8 7p - 5p = 8 - 2 2p = 6 p = 3
8p+5 = 11+7p= 8p-7p = 11-5p = 6
5p + 4y
7p+5q=-3, p=1 7Xp+5q=-3 7+5q=-3 5p=-10 p=-2
14 + 6p = 6 + 7p 8 = p
7p + 2 = 5p + 8 7p - 5p = 8 - 2 2p = 6 p = 3
8p+5 = 11+7p= 8p-7p = 11-5p = 6
5p + 4y
5p + 15p + 7p = 27p 5p - 15p + 7p = -3p 5p x 15p + 7p = 75p2 + 7p 5p/15p + 7p = 7p + 1/3
-3p
5p-7q
7p+5q=-3, p=1 7Xp+5q=-3 7+5q=-3 5p=-10 p=-2
14 + 6p = 6 + 7p 8 = p
7p + 2q = 46 . . . . (A) 5p + 3q = 36 . . . . (B) 3*(A): 21p + 6q = 138 2*(B): 10p + 6q = 72 Subtracting gives 11p = 66 so that p = 6 Substitute for p in (A): 7*6 + 2q = 46 or 42 + 2q = 46 which gives 2q = 4 so that q = 2 Solution: (p, q) = (6,2)
4p+9-7p+2 -3p+11 p = 11/3
4p + 9 - 7p + 2 4p - 7p + 9 + 2 p(4 - 7) + 9 + 2 -3p + 11
11p+11