1. Xiaoming bought four pens, two stationery and 1 * * with 40 yuan money. 6.4 yuan, how much is the stationery per pen? (Solve with equation! ! ) List the equation process!

Set a pencil box x yuan.

1 4×6.4+2x=40 x=7.2

1. Mom bought 5 Jin of apples and 8 Jin of chestnuts, and each Jin of apples cost 28.8 yuan. How much is a catty of chestnuts?

.2 Two wires with the same length, the first one is 24m, the second one is 36m, and the remaining length of the first one is 1.5 times that of the second one. How long are the original two lines?

1 is set as x yuan per catty of chestnuts.

5× 1.92+8x=28.8 x=2.4

2 Set the original length of the wire to x meters.

x-24= 1.5(x-36) x=60