Răspunsuri

  • Utilizator Brainly
2014-10-30T19:46:17+02:00
23-2* [15-(74-2x):4+3]=9
2*[15-(74-2x):4+3]=23-9=14
15-(74-2x):4+3 = 14:2=7
15-(74-2x):4=7-3=4
(74-2x):4=15-4=11
74-2x=11*4=44
2x=74-44
2x=30
x=30:2
x=15
23-2* [15-(74-2x):4+3]=9
2*[15-(74-2x):4+3]=23-9=14
15-(74-2x):4+3 = 14:2=7
15-(74-2x):4=7-3=4
(74-2x):4=15-4=11
74-2x=11*4=44
2x=74-44
2x=30
x=30:2
x=15
scz ca e cu nr. mici :(
2014-10-30T19:53:34+02:00
23-2·[15-(74-2·x):4+3]=9
23-2·[15-(74-2x):4+3]=9
2·15-74-2x:4+3=9
30-74-2x:4=9-3
30-74-2x:4=6
30-74-2x=6·4
30-74-2x=24
-44-2x=24
-2x=24+44(deoarece se trece cu semn schimbat)
-2x=68⇒x=34
Sper ca a fost ok si ca nu am gresit :)