Question

11 Реши уравнения.
8y - 345 = 455
630 : (150 - x) = 70
35 + (b + 165) = 658
400. (x - 5) = 10 000​

Answer 1

Ответ:

1. у = 100

2. х = 141

3. b = 458

4. x = 30

Объяснение:

1. 8у – 345 = 455

8у = 455 + 345

8у = 800

у = 100

2. 630 : (150–х) = 70

630/150–х = 70

630 = 70•(150–х)

9 = 150–х

х= 150–9

х = 141

3. 35+(b+165)=658

35+b+165=658

200+b=658

b=658–200

b=458

4. 400.(x–5)=10 000

400x–2 000=10 000

400x=10 000+2 000

400x=12 000

x = 30