Question

Determină numărul natural x din egalitatea: [(x •2 + 3) · 4:5+6] + 7-8 = 9.Dau coroana va rog​

Answer 1

[(x •2 + 3) · 4:5+6] + 7-8 = 9

[(x •2 + 3) · 4:5+6]-1=9

[(x •2 + 3) · 4:5+6] =9+1

(x •2 + 3) · 4:5+6=10

(x •2 + 3) · 4:5=10-6

(x •2 + 3) · 4:5=4

(x •2 + 3) · 4=4x5

(x •2 + 3) · 4=20

(x •2 + 3) =20:4

x •2 + 3 =5

x •2=5-3

x •2=2

x=2:2

x=1

Answer 2

Răspuns:

[(x •2 + 3) · 4:5+6] + 7-8 = 9

[(x•2+3)•3:5+6]+7=9+8

[(x •2 + 3) · 4:5+6] +7=17

[(x •2 + 3) · 4:5+6] =17-7

(x•2+3)•4:5+6=10

(x•2+3)•4:5=10-6

(x•2+3)•4:5=4

(x•2+3)•4=4x5

(x•2+3)•4=20

(x•2+3)=20:4

x•2+3=5

x•2=5-3

x•2=2

x=2:2

x=1