2p+2a=12
4p+4s=28
5a+5s=25
1a=?, 1p=?, 1s=?
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(2p+2a):2= 1p+1a=12:2=6
(4p+4s):4= 1p+1s=28:4=7
(5a+5s):5=1a+1s= 25:5=5
1p+1s+1a+1s=7+5=12
1p+1s+1a+1s=1p+2s+1a=12
1p+2s+1a-1p+1a=2s=12-6=6
2s=6
1s=6:2=3
1s=3 ( un suc = 3 ron )
3×4=12=4s
28-12=16 ( 4 p )
16:4=4 ( 1 p )
4×2=8 ( 2 p )
12-8=4 ( 2 a )
4:2=2 ( 1 a )
R: un suc = 3 ron
o acadea= 2 ron
o prajitura= 4 ron