Question

determina Nr natural x din egalitatea:[(x•2+3)•4:5+6]+7-8=9​

Answer 1

Răspuns:

[(x•2+3)•4:5+6]+7-8=9​

[(x·2+3)·4:5+6]+7=9​+8

(x·2+3)·4:5+6=17-7

(2x+3)·4:5=10-6

8x+12=4·5

8x=20-12

x=8:8

x=1

Answer 2

Răspuns:

x = 1

Explicație pas cu pas:

[(x • 2 + 3) • 4 : 5 + 6] + 7 - 8 = 9

[(x • 2 + 3) • 4 : 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 = 4 × 5

(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