Answer:
$12,000
Step-by-step explanation:
Let's say the husband's income was $H, and the Wife's was W.
h + w = 75,000
H = 5w + 15, 000
Substitute that for H.
5w + 15,000 + w = 75,000
6w + 15,000 = 75,000
6w=60,000
w=12,000, So the wife earned $12,000.
