Answer:
x = 25
Step-by-step explanation:
ΔBDR ~ ΔQDC
so
(24 + 40)/(15 + x) = 40/x
or
(24 + 40)/40 = (15 + x)/x
24/40 + 40/40 = 15/x + x/x
3/5 + 1 = 15/x + 1
3/5 = 15/x
Cross multiply,
3x = 15*5 = 75
x = 75/3 = 25
