40% of money on books
100-40=60
60% left
50% of remaining on toys
50% of 60%=30%
he has 21 left
21=30%
find 100%
$21=30%
divide by 3
$7=10%
times 10
$70=100%
he had $70 at first
60 min in one hour put everything in minutes
12 paper cranes in 60 min (0ne hour)
12/60=X/10
Cross multiply
60x= 120
Divide by 60
X= 2 cranes in 10 min
Answer 2
One because 9-8=1 and you just substitute the variable
The value of x is 55.
It is a 90 degree angle so you subtract 90 and 35 to get 55.
