Question

15kg.cartofi........12kg.varză........69lei/:3 5kg.cartofi..........7kg.varză........29lei 1kg.cartofi=?lei 1kg.varză=?lei

Answer 1

15kg cartofi........................12kg varza........................69 lei
5kg cartofi..........................7kg varza..........................29 lei /x3
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15kg cartofi........................12kg varza.......................69 lei
15kg cartofi........................21kg varza.......................87 lei
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//                                         9kg varza=18 lei
1kg varza=18:9
1kg varza=2 lei

15kg cartofi+12x2=69 lei
15c+24=69
15c=69-24
15c=45
1kg cartofi=3 lei

15x3+12x2=45+24=69 lei

varianta ta:
15c+12v=69  /:3
  5c+7v=29
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5c+4v=23
5c+7v=29
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//      3v=6
1kg varza=6:3
1kg varza=2 lei

5c+7x2=29
5c+14=29
5c=15
1kg cartofi=15:5
1 kg cartofi=3 lei