Solve the following simultaneous equations for x and y: 7a 5a 11 --- + --- = --- x y 4 and 5a 2a 17 --- - --- = --- x y 20
Solution:
x = 4a
y = 5a x, y, a can not = 0
To solve: Multiply the top equation by 2 and
the bottom equation by 5. Adding will
eliminate the term with 10a/y in it.
Then solve
for x in terms of a.
Correctly solved by:
| 1. Dave Manning | Coopersburg, PA (Lehigh University) |