Question

ПОМОГИТЕ СРОЧНО ПЖ!!!!!!!?​

Answer 1

Ответ:

а) 4(х + 7) = 80

4х + 28 = 80

4х = 80 - 28

4х = 52

х = 52 ÷ 4

х = 13

b) 13(х + 8) = 260

13x + 104 = 260

13x = 260 - 104

13x = 156

x = 156 ÷ 13

x = 12

c) 11(29 + x) = 495

319 + 11x = 495

11x = 495 - 319

11x = 176

x = 176 ÷ 11

x = 16

d) 17(2x + 12) = 714

34x + 204 = 714

34x = 714 - 204

34x = 510

x = 510 ÷ 34

x = 15