Question

Folosind egalitatile : x*a=15, x*b=23, x*c=37 si m+n+r=93, calculati:
a) x*(a+b+c)+13*m+13*n+13*r
b) x*(a+b+c)*(m+n+r-43)
c) (m+n+r)*x(a+b+c)+256
d) x*(a+c)*(m+n+r)-x*b-x*c
e) x*(a+b+c)+x*c*m+x*c*n+x*c*r
f) x*(a+b)+x(b+c)+9*m+9*n+9*r
Stiu ca sunt cam multe, dar am nevoie urgent de rezolvare.
Si le vreau pe toate, nu numai un exercitiu.
Multumesc!

Answer 1

x*(a+b+c)+13(m+n+r)=x*(a+b+c)+13*93=x*(a+b+c)+1209
x*a+x*b+x*c=15+23+37
x*(a+b+c)=75
Deci rezulta ca x*(a+b+c)+1209=75+1209=1284
R pt.pct a=1284
x*(a+b+c)*(m+n+r-43)=75*(93-43)=75*50=3750
R pt.pct.b =3750
(m+n+r)*x(a+b+c)+256=93*75+256=6975+256=7231
Rpt.pct.c=7231
x*(a+c)*(m+n+r)-x*b-x*c=x*(a+c)*93-23-37=52*93-60=4836-60=4776
R pt.pct d=4776
x*(a+b+c)+x*c*m+x*c*n+x*c*r=75+xc*(m+n+r)=75+37*93=75+3441=3516
Rpt.pct.e=3516
x*(a+b)+x*(b+c)+9(m+n+r)=38+60+9*93=98+837=935
Rpt.pct f=935