Question

3. Реши уравнения. а) х•(25:5) = 350. r + 120 : 4 = 150 б) (40 • 3) : х = 450. 25 : 5 • х = 450. в) х : (15 • 2) = 3. с• ( 50 • 2) = 500
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Answer 1

Ответ:

Х×(25:5)=350

5х=350

х=350:5

х=70

r+120:4=150

r+30=150

r=150-30

r=120

(40×3):x=6

120:х=6

х=120:6

х=20

25:5×x=450

5х=450

х=450:5

х=90

x:(15×2)=3

х:30=3

х=3*30

х=90

c×(50×2)=500

100с=500

с=500:100

с=5

Answer 2

Ответ:

а

х×(25:5)=350

х×5=350

х=350÷5

х=70

r+120÷4=150

r+30=150

r=150-30

r=120

25÷5×x=450

5×x=450

x=450÷5

x=90

x÷(15×2)=3

x÷30=3

x=30×3

x=90

c×(50×2)=500

c×100=500

c=500÷100

c=5