perimetrul unui dreptunghi este egal cu 24cm .calculati aria dreptunghiului daca lungimea sa este de 5 ori mai mare decat latimea
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5
p=24cm
latimea=l
lungimea= L=5ori l
2 inmultit cu L+ 2 inmultit cu l= 24
2 inmultit cu 5 inmultit cu l + 2 inmultit cu l=24
10 l+ 2 l =24
12 l=24
l=24 impartit la 12 =2
l=2
L=12-2=10 succes!!!!
latimea=l
lungimea= L=5ori l
2 inmultit cu L+ 2 inmultit cu l= 24
2 inmultit cu 5 inmultit cu l + 2 inmultit cu l=24
10 l+ 2 l =24
12 l=24
l=24 impartit la 12 =2
l=2
L=12-2=10 succes!!!!
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