√44. Реши уравнения. x · 9 = 130 + 140 x : 8 = 200 – 120 164 – x = 720 : 9

Решим уравнения:

1) x × 9 = 130 + 140

x × 9 = 270

x = 270 : 9

x = 30

2) x : 8 = 200 – 120

x : 8 = 80

x = 80 × 8

x = 640

3) 164 – x = 720 : 9

164 – x = 80

x = 164 - 80

x = 84

Ответ: 1) x = 30; 2) x = 640; 3) x = 84.