Practice Set 1.4 by 1. Solve the following simultaneous equations. 2 3 (1) 8 5 15 ; -+-= = 77 = ху + x y er's 15 5 () (2) 10 2.
-=4 ; x+y x- y = -2 x+y x-y 27 31 (3) + = 85 ; 31 27 + = 89 x- 2y+3 x- 2y+3 (4) 1 1 3 3x + y 3x - y 4 + II 1 1 2(3x + y) 2(3.x - y) 8 19
2 answers:
Answer:
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