Three pears plus an apple is 710 grams, five apples plus a pear is 1050 grams. How many grams does a pear weigh?

Three pears plus an apple is 710 grams, five apples plus a pear is 1050 grams. How many grams does a pear weigh?

Primary school solution: there is a problem,
One apple = 710g - three pears
Five apples + one pear = 5 * (710g - three pears) + one pear = 1050g
3550-14 pears = 1050
14 pears = 2500 g
One pear = 1250 / 7g

An apple and a pear are 250 grams in total. How many grams are each

125 grams each

The girl takes an apple and a pear for you to choose
I said whatever, she gave me an apple, and the next day she gave me a pear

Apple

An apple and a pear weigh 28 grams, an apple and an orange weigh 200 grams, and a pear and an orange weigh 220 grams,
An apple and a pear weigh 280 grams, an apple and an orange weigh 200 grams, and a pear and an orange weigh 220 grams. How many grams do an apple, a pear and an orange weigh?

According to the conditions, 280 + 200 + 220 = 700 is the total weight of two apples, two oranges and two pears,
Then divide by 2 to get 350, which is the sum of the weight of an apple, an orange and a pear. Then 350-280 can get the weight of 70 oranges, 220-70 can get the weight of 150 pears, and 280-150 can get the weight of 130 apples