Question

6 Află numerele necunoscute.
a. 45 : x x 100 = 900
160 x 5: x = 100
b. 824 - 240 : x = 800
245 + 50 x x = 745
c. X: 12 x 9 = 396
x x 16:5 = 1360​

Answer 1

45 : x * 100 = 900

45 : x = 900 : 100

45 : x = 9

x = 45 : 9

x = 5

160 × 5 : x = 100

800 : x = 100

x = 800 : 100

x = 8

824 - 240 : x = 800

240 : x = 824 - 800

240 : x = 24

x = 240 : 24

x = 10

245 + 50 * x = 745

50 * x = 745 - 245

50 * x = 500

x = 500 : 5

x = 100

x : 12 × 9 = 396

x : 12 = 396 : 9

x : 12 = 44

x = 44 × 12

x = 528

x * 16 : 5 = 1360

x * 16 = 1360 × 5

x * 16 = 6.800

x = 6800 : 16

x = 425