x:20=40、3 210:x=420:6 ・110=110 480:x=480 エ-260=0 y+0=300

Ответ: x = 120; x = 3; x = 210; x = 1; x = 260; y = 300

Решим уравнения:

1. x : 20 = 40 · 3

   x : 20 = 120

   x = 120 · 20

   x = 2400

2. 210 : x = 420 : 6

   210 : x = 70

   x = 210 : 70

   x = 3

3. x - 110 = 110

   x = 110 + 110

   x = 220

4. 480 : x = 480

   x = 480 : 480

   x = 1

5. x – 260 = 0

   x = 0 + 260

   x = 260

6. y + 0 = 300

   y = 300

Ответ: x = 2400; x = 3; x = 220; x = 1; x = 260; y = 300