Plsssssssss....va rog

Răspuns:

6 puzzle......7rummy....460 lei-

3 puzzle.......4rummy...250 lei

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3 puzzle   +    3 rummy =210 lei

3p+3r=210=>3(p+r)=210=>p+r=210:3=>p+r=70 lei coste un puzzle+un rummy

p+r=70=>p=70-r

6p+7r=460

6(70-r)+7r=460

420-6r+7r=460

r=460-420=40 lei costa un rummy

3puzzle+4rummy=460 lei...............3puzzle+3rummy=210 adicaa 460-250............3 puzzle +4rummy=250 lei 3puzzle +3 rummy=210 ............=> 250-210=40.....asa am facut la scoala