Xiaolan has 12 fewer pictures than Xiaoli, which is just 30% of Xiaoli's

Xiaolan has 12 fewer pictures than Xiaoli, which is just 30% of Xiaoli's

Let Xiao Li have X Pictures,
According to the meaning of the question: 30% x = 12
The solution is x = 40
Xiaolan: 40-12 = 28

Xiaoli has 12 color pictures, 5 / 7 more than Xiaolan's. how many color pictures does Xiaolan have?

12 / (1 + 5 / 7) = 7 (sheets)
A: Xiaolan has seven color pictures

Xiaoli has 12 color pictures, 5 / 7 less than Xiaolan's. how many color pictures does Xiaolan have?

Xiaolan = 12 (1-5 / 7) = 42 sheets

Xiao Li and LAN LAN play rope skipping. Xiao Li jumps four times as many as LAN LAN. Lan Lan jumps 39 more than Xiao Li. How many do Xiao Li and LAN LAN jump each? How many is the equation

Answer with arithmetic: Xiaoli jumps more than Lanlan, and the number of Lanlan jumps is three times, 39 ÷ (4-1) = 13, 13 × 4 = 52, so Xiaoli jumps 52, Lanlan jumps 13
Let's have X jumps
4x=x+39
x=13
4x=52
Xiaoli 52, Lanlan 13