Риши уравнения (30 * х) : 25 = 60 389 - х : 70 = 349

Пошаговое объяснение:

(30*х):25=60

30х=60*25

30х=1500

х= 1500:30

х=50

(30*50):25=60

60=60

389-х:70=349

х:70=389-349

х:70=40

х=40*70

х=2800

389-2800:70=349

349=349

(30 * х) : 25 = 60

30 * x = 60 * 25

30 * x = 1500

x = 1500 : 30

x = 50

(30 * 50) : 25 = 60

60 = 60

389 - х : 70 = 349

x : 70 = 389 - 349

x : 70 = 40

x = 40 • 70

x = 2800

389 - 2800 : 70 = 349

349 = 349