Question

2 caiete 4 pixuri costa 16 ,iar un caiet si 5 pixuri costa 17 lei . cat costa un pix si cat costa un caiet?

Answer 1

2c+4p=16 1c+5p=17 1p=1c+1lee 2c+4c+4=16 6c=12 c=2 2+5p=17 5p=15 p=3

Answer 2

2c+4p=16
1c+5p=17  / *-2

2c+4p= 16
-2c-10p= -34
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 /  - 6 p= -18
1 p = 3 lei

 2c+4p=16
2c +4*3= 16
2c +12=16
2c=4
1 c=2 lei