Question

Afla numarul necunoscut:
352:c=12 rest 4
20:d×35=700
1706+f×13=2031
X:13×9=819

Answer 1

352 : c = 12 rest 4

c = ( 352 - 4 ) : 12

c = 348 : 12

c = 29

20 : d × 35 = 700

20 : d = 700 : 35

20 : d = 20

d = 20 : 20

d = 1

1706 + f × 13 = 2031

f × 13 = 2031 - 1706

f × 13 = 325

f = 325 : 13

f = 25

X : 13 × 9 = 819

X : 13 = 819 : 9

X : 13 = 91

X = 91 × 13

X = 1183