3*x=x+60,
Solution: x=30, that is, 30 yellow flowers, 90 red flowers, *** 120 flowers.
Question 2: If the number of basketballs is X, then there are
20=x+x* 1/4
Get x= 16, which means buying 16 basketballs.
Question 3: If the price of C vase is X, then there is.
18/ 15*x=2/5*24
The solution is x=8.
Question 4: If the original price is X, then there is.
(x+x*30%)*0.8-x=26.4
X=660 yuan.