2X+ 12=3X-2
X= 14
So, there are 14 children and 40 sweets.
2. If X trees are planted in the fourth level, then (3X- 1) trees are planted in the sixth level and (2X+3) trees are planted in the fifth level.
x+(3X- 1)+(2x+3)= 1 10
X= 18
Therefore, there are 18 strains in Grade 4, 39 strains in Grade 5 and 53 strains in Grade 6.
3. Set a towel X yuan and a soap Y yuan, and make an equation.
2X+3Y= 18
3X+2Y= 19
Solution, X=4.2, Y=3.2.
So X+Y=7.4 yuan.
A towel and a bar of soap, 7.4 yuan.