Date: Tue, 1 Aug 2000 15:55:57 EDT
please help me with this homework question. 5/x + 6/y= 19/6 3/x + 4/y
=2 This is a question I answered wrong on a test: solve the given system for x, y, and z. Express your solutions in terms of a, b, and c.
x+y=a Using the hint the equations become 3a + 4b = 2 I would multiply the first equation by 5 and the second equation by 3 so that in both cases the coefficient of a is 15. Subtract the two equations and solve for b and hence y which is 1/b. For the second problem, subtract the first two equations so the left side is xz. Then add this equation to the third equation so the left side becomes 2x. Finally divide both sides by 2 to get x=... In a similar way solve for y and z. Cheers,Penny
