Question

o prajitura costa cat 4 cornuri ,iar 2 prajituri si 2 cornuri costa 10 lei .
cat costa o prajitura ,dar un corn

Answer 1

Notam
p=prajitura
c=corn
p=4c
2p+2c=10
2*4c+2c=10
8c+2c=10
10c=10
c=1
p=4c=4*1=4    
eu in clasa a8a asa le fac dar poti sa o faci si asa:

daca in loc de prajitura am lua tot cornuri cate am cumpara?
4 x2 = 8
cate cornuri am lua in total?
8 + 2 = 10
cat costa un corn?
10 : 10 = 1 leu
cat costa o prajitura?
1x 4 = 4 lei