Number of students participating in art projects

x+y=32

x-y=4

2. Solution: Let the unit price of apples be X yuan and that of pears be Y yuan.

1.4Y=X

5X+6Y=39

To solve this system of equations, X=4.2.

Y=3

Test: (write it yourself)

Answer: Write it yourself.

3. There are X students, showing Y stamps.

3X+35=Y

4X- 15=Y

To solve this system of equations, X=50.

Y= 185

Test: write it yourself

Answer: Write it yourself.

4. Set up X old cows and Y ponies.

Y+2=X

X+ 1=2(Y- 1)

To solve this system of equations, X=7.

Y= 10

Test: write it yourself

Answer: Write it yourself.

5. Set the length x cm and the width y cm.

X+Y=80

80-60 = 2 years old

To solve this system of equations, X=7.

Y= 10

Test: write it yourself

Answer: Write it yourself.

6. Set X cubic meters as the desktop and Y cubic meters as the legs.

X+Y=25

5X=30Y× 1/4

To solve this system of equations, X= 15.

Y= 10

Test: write it yourself

Answer: Write it yourself.

Exactly, plus points! ! ! !

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