Question

8 Реши уравнения. (x +47 972): 75 600 = 512 400 (z - 30 985): 15 = 12 000 - 9731 3 x - 7800 = 1200 (k + 2 958) : 57 = 139​

Answer 1

Ответ:

1) (x+47 972): 75 600 = 512 400

x+47 972 = 512 400 * 75 600

x+47 972 = 38 803 040 000

x = 38 803 040 000 - 47 972

x = 38 802 992 028

2) (z-30 985): 15 = 12 000 - 9731

z-30 985 = (12 000 - 9731) * 15

z-30 985 = 4 785

z = 35 770

3) 3-x-7800 = 1200

-x-7797 = 1200

-x = 8 997

x = -8 997

4) (k + 2 958) : 57 = 139

k + 2 958 = 139 * 57

k + 2 958 = 7 923

k = 4 965

Answer 2

Пошаговое объяснение:

(х + 47972) : 75600 = 512

х + 47972 = 512 * 75600

х + 47972 = 38707200

х = 38707200 - 47972

х = 38 659 228

400(z - 30985) : 15 = 12000 - 9731

400(z - 30985) : 15 = 2269

400(z - 30985) = 2269 * 15

400(z - 30985) = 34035

z - 30985 = 34035 : 400

z - 30985 = 85,0875

z = 85,0875 + 30985

z = 31070,0875

3х - 7800 = 1200

3х = 1200 + 7800

3х = 9000

х = 9000 : 3

х = 3000

(к + 2958) : 57 = 139

к + 2958 = 139 * 57

к + 2958 = 7923

к = 7923 - 2958

к = 4965