1. For a project, the planned investment is 1.2 million yuan, and the actual investment is saved by 5 / 24. How much is the actual investment? (please use the equation to answer) 2. The students in the biology group have 40 white rabbits, and the number of white rabbits is 3 / 5 more than that of black rabbits. How many black rabbits are there? (please use the equation to answer)

1. For a project, the planned investment is 1.2 million yuan, and the actual investment is saved by 5 / 24. How much is the actual investment? (please use the equation to answer) 2. The students in the biology group have 40 white rabbits, and the number of white rabbits is 3 / 5 more than that of black rabbits. How many black rabbits are there? (please use the equation to answer)

1. The actual investment is x 10000 yuan
x/（1—5/24)=120
2. Suppose there are x Black rabbits
x/（1—3/5)=40

Column equation: 4 / 5 of a number is 24 more than 12

Let this number be X
There is an equation according to the meaning of the question
4/5x-24=12
4/5x=36
x=45

Among the four numbers - 6, 12, 18 and 24, the number of solutions of the equation is: x-3 = 1 / 3 x + 1_____

24
The process is as follows
½ x-3 = 1 / 3 x + 1
1/6x=4
x=24

75% of a number is 6 less than 24. Find the number
2 / 5 of a certain number is 0.4 more than 2 times of 4.8. What is the number? (solution of a series of equations)
The number a is 9 / 10, the number B is 2 / 3 of the number a, and it's just 25% of the number C. what's the number C/
The sum of 30% and 48 of a number is 174. Find the number

1. Let this number be X
0.75x+6=24
x=18/0.75=18*4/3=24
2. Let this number be X
2x/5-4.8*2=0.4
2x/5=10
x=25
3. If the number a is 9 / 10, the number B is 2 / 3 of the number a, then the number b = 2 / 3 * 9 / 10 = 3 / 5, and the number B is exactly 25% of the number C, then if the number C is x, 3 / 5 = 25X / 100, x = 3 / 5 * 100 / 25 = 12 / 5, then the number C is 12 / 5
4. Let this number be X
30x/100+48=174
30x/100=126
x=126*100/30=420