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Daca a x b=45,iar a x c=35 calculati: 1) a x(b+c):8 2) a x (b-c);2

Daca a x b =36,iar c x a=12 calculati : 1) a x (b+c):6 2) a x (b-c):4

Răspuns :

Beatriceionela
a=5
b=9
c=7=>....1) 5x(9+7):8=5x16:8=10
 2) 5x(9-5):2=5x4:2=10
axb=36
cxa=12=>        6x6=36 si 2x6=12
deci:a=6; b=6;c=2
1) 6x(6+2):6=6x8:6=8
2)6x(6-2):4=6x4:4=6

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