Question

x+3/65=4/13
7/x+4=21/60
5x-8/5=18/45​

Answer 1

1) х+3/65=4/13

х=4/13-3/65

х= 4-3

65-13=1/52

Answer 2

Пошаговое объяснение:

х + 3/65 = 4/13

х = 4/13 - 3/65

х = 20/65 - 3/65

х = 17/65

7/(х + 4) = 21/60

21 * (х + 4) = 60 * 7

21х + 84 = 420

21х = 420 - 84

21х = 336

х = 336 : 21

х = 16

(5х - 8)/5 = 18/45

45 * (5х - 8) = 18 * 5

225х - 360 = 90

225х = 90 + 360

225х = 450

х = 450 : 225

х = 2