It costs 65 yuan to buy 10 kg apples and 20 kg pears. The price of 1 kg apples is equal to that of 1.25 kg pears

It costs 65 yuan to buy 10 kg apples and 20 kg pears. The price of 1 kg apples is equal to that of 1.25 kg pears

The price of 1 kg apple is the same as that of 1.25 kg pear, so the price of 10 kg apple is the same as that of 1.25 × 10 = 12.5 kg pear
Therefore: to buy 10 kg apples and 20 kg pears is equivalent to buying 12.5 + 20 = 32.5 kg pears
Price per kilogram of pear = 65 △ 32.5 = 2 (yuan)
65÷（1.25×10+20）
=65÷32.5
=2 yuan

It costs 65 yuan to buy 10 kg apple and 20 kg pear. The price of 1 kg apple is the same as that of 1.25 kg pear. How many yuan per kg pear?

The price of 1 kg apple is the same as that of 1.25 kg pear, so the price of 10 kg apple is the same as that of 1.25 × 10 = 12.5 kg pear
Therefore: to buy 10 kg apples and 20 kg pears is equivalent to buying 12.5 + 20 = 32.5 kg pears
Price per kilogram of pear = 65 △ 32.5 = 2 (yuan)
65÷（1.25×10+20）
=65÷32.5
=2 yuan

It costs 70 yuan to buy 10 kg apple and 20 kg pear. The price of 1 kg apple is equal to that of 1.5 kg pear. How much is 1 kg apple? How much is 1 kg pear?
Don't do it with equations

Pear = 70 ÷ (10 × 1.5 + 20) = 2 yuan
Apple = 2 × 1.5 = 3 yuan
Do not understand can ask, help please adopt, thank you!

It costs 65 yuan to buy 10 kg apples and 20 kg pears. The price of 1 kg apples is the same as that of 1.5 kg pears
Arithmetic method (not equation 0)

10x + 20x (multiply by) 1.5x = 65
10X+30X=65
X = 1.625 apple
1.5X=3.35
The second method is to set the unit price of apple as X and pear as y
10x + 20Y = 651.5x = y. if you take y = 1.5x in, you can get x = 1.625