Question

10. Afla necunoscuta:
X: (18-12) = 8
f: 5x4=8
e x3:6= 4
(13+a): 8 = 7
33-ax 4 = 13
12 + 8 xi = 36​

Answer 1

Răspuns:

X:6=8

X:8-6

X=2

F:20=8

F:8-20

F:-12

Answer 2

Răspuns:

Explicație pas cu pas:

x : ( 18 - 12) = 8

x : 6 = 8

x = 8 × 6

x = 48

________________

f : 5 × 4 = 8

f : 5 = 8 : 4

f : 5 = 2

f = 2 × 5

f = 10

Verific:   10 : 5 × 4 = 2 × 4 = 8

___________________________

e × 3 : 6 = 4

e = 4 × 6 : 3 → aplic metoda mersului invers

e = 24 : 3

e = 8

Verific   8 × 3 : 6 = 24 : 6 = 4

________________________

( 13 + a ) : 8 = 7

13 + a = 7 × 8

13 + a = 56

a = 56 - 13

a = 43

__________________

33 - a × 4 = 13

a × 4 = 33 - 13

a × 4 = 20

a = 20 : 4

a = 5

____________________

12 + 8 × i = 36

8 × i = 36 - 12

8 × i = 24

i = 24 : 8

i = 3

Verific:    12 + 8 × 3 = 12 + 24 = 36