Răspuns :
--- 3, evaluare 3
g=4r
3 (r+2) = g-- 4 ; g-- 3r = 10
4r -- 3r = 10
r= 10
g= r x 4
=10x 4 = 40
--- 4 , evaluare 3
a+ b= 702
a-b= b: 4
Acum inlocuiesti in suma a-ul cu relatia a3a adica 4b + b + 4b= 702 x 4
= 2808
9b= 2808
b= 2808:9 = 312
a= 702- 312 = 390
---3 , evaluare 4
a + r= 460
a+8 =3r=>a = 3r- 8 = r = 460
4 r- 8 = 460
4r= 460+8
4r= 468
r= 468: 4 =117
a= 343
g=4r
3 (r+2) = g-- 4 ; g-- 3r = 10
4r -- 3r = 10
r= 10
g= r x 4
=10x 4 = 40
--- 4 , evaluare 3
a+ b= 702
a-b= b: 4
Acum inlocuiesti in suma a-ul cu relatia a3a adica 4b + b + 4b= 702 x 4
= 2808
9b= 2808
b= 2808:9 = 312
a= 702- 312 = 390
---3 , evaluare 4
a + r= 460
a+8 =3r=>a = 3r- 8 = r = 460
4 r- 8 = 460
4r= 460+8
4r= 468
r= 468: 4 =117
a= 343
1
a=raftul 1
3a/5 =raft 2
6a/5 =raft 3
3a/5 x 5/6=a/2 raft 4
a+3a/5+6a/5+a/2=8250
a+9a/5+a/2=8250
10a+18a+5a=82500
33a=82500
a=2500 carti pe raftul 1
3x2500/5=1500 carti raft 2
6x2500/5=3000 carti raft 3
a/2=2500/2=1250 carti raft 4
2
a=rate
4a=gaini
3(a+2)=4a-4
3a+6=4a-4
a=10 rate
10x4=40 gaini
3.a=bile rosii
b= bile albe
b+8=3a b=3a-8
a+b=460
a+3a-8=460
4a=468
a=117 bile rosii
b=343 bile albe
a=raftul 1
3a/5 =raft 2
6a/5 =raft 3
3a/5 x 5/6=a/2 raft 4
a+3a/5+6a/5+a/2=8250
a+9a/5+a/2=8250
10a+18a+5a=82500
33a=82500
a=2500 carti pe raftul 1
3x2500/5=1500 carti raft 2
6x2500/5=3000 carti raft 3
a/2=2500/2=1250 carti raft 4
2
a=rate
4a=gaini
3(a+2)=4a-4
3a+6=4a-4
a=10 rate
10x4=40 gaini
3.a=bile rosii
b= bile albe
b+8=3a b=3a-8
a+b=460
a+3a-8=460
4a=468
a=117 bile rosii
b=343 bile albe