Răspuns :
s-stofă
c-catifea
3s+4c=454.50 /•3
4s+3c=551.75 /•(-4)
9s+12c=1363.5
-16s-12c=-2207
Adunăm ecuațiile:
-7s=-843.5
s=120.5 lei 1m de stofă
9s+12c=1363.5
9•120.5+12c=1363.5
1084.5+12c=1363.5
12c=1363.5-1084.5
12c=279
c=279:12
c=23.25 lei 1m de catifea
c-catifea
3s+4c=454.50 /•3
4s+3c=551.75 /•(-4)
9s+12c=1363.5
-16s-12c=-2207
Adunăm ecuațiile:
-7s=-843.5
s=120.5 lei 1m de stofă
9s+12c=1363.5
9•120.5+12c=1363.5
1084.5+12c=1363.5
12c=1363.5-1084.5
12c=279
c=279:12
c=23.25 lei 1m de catifea
3 m stofa....4 m catifea....454.50 lei
4 m stofa ....3 m catifea....551.75 lei
----------------------------------------------------
1 m stofa ..... 1 m catifea....107.25 lei
4 m stofa ....3 m catifea....551.75 lei
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1 m stofa ..... 1 m catifea....107.25 lei