## College Algebra (6th Edition)

$(\frac{1}{a}, 3)$
Multiply ax + 7y = 22 by 5 5ax + 35 y = 110 Subtract this from the other equation. 5ax + 35y = 110 5ax + 4y = 17 You get: 31y = 93 y = 3 Plug y into 5ax + 4y = 17 5ax + 12 = 17 5ax = 5 x = $\frac{1}{a}$