Question

va rog frumos ajutati-ma  la aflarea nr necunoscut
(525:5+b):5+12=790
(65x502:10-c-63);3=600
[(e;8+56090:2-111];10=400
(540:6x9-755):(g-386)=5
va multumesc

Answer 1

1)(525:5+b):5+12=790
(105+b)/5=790-12
105+b=778·5
b=3890-105
b=3785
2)   (65·502:10-c-63):3=600
(32630:10-c-63)/3=600
(3263-c-63)=600·3
-c=1800-3263+63
-c=-1463+63
-c=-1400       ·(-1)
c=1400
3)  (e:8+56090:2-111):10=400
(e/8+28045-111)/10=400
(e/8+27934)=400·10
e/8=4000-27934
e/8=-23934
e=-23934·8=-191504
asta cu conditia sa fi scris bine ex.ceea ce ma indoiesc
4) (540:6·9-755):(g-386)=5
(90·9-755)/(g-386)=5
(810-755)/(g-386)=5
55/(g-386)=5/1
5(g-386)=55
5g-1930=55
5g=55+1930
g=1985/5
g=397