Răspuns :
notezi grau cu “g” si porumb cu “p”
7g + 8p = 520
4g + 8p = 400
—————
Scazi cele doua ecuatii si vei obtine
3g = 120
g = 120 : 3 = 40kg
4g + 8p = 400kg
4 * 40 + 8p = 400
160 + 8p = 400
8p = 400 - 160 = 240
p = 240 : 8 = 30kg
7g + 8p = 520
4g + 8p = 400
—————
Scazi cele doua ecuatii si vei obtine
3g = 120
g = 120 : 3 = 40kg
4g + 8p = 400kg
4 * 40 + 8p = 400
160 + 8p = 400
8p = 400 - 160 = 240
p = 240 : 8 = 30kg