Răspuns :
1)|_|+9
2)|_|+15
3)|_|+11
4)|_|+12 în total 67
67-9-15-11-12=67-47=20
20:4=5
1)5+9=14
2)5+15=20
3)5+11=16
4)5+12=17
2)|_|+15
3)|_|+11
4)|_|+12 în total 67
67-9-15-11-12=67-47=20
20:4=5
1)5+9=14
2)5+15=20
3)5+11=16
4)5+12=17
a+b+c+d=67
(a-9)=(b-15)=(c-11)=(d-12)=> 4nr.egale ....(a=b=c=d)
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a=? b=? c=? d=?
notam: a=b=c=d...=> 4x...(4 nr.egale)....=> a=x+9; b=x+15; c=x+11 si d=x+12
adica....(a-9)+(b-15)+(c-11)+(d-12)= 4*x=4x
a) |____|+9
b) |____|+15
c) |____|+11
d) |____|+12
........................
4x++9+15+11+12=67
4x+24+23=67
4x+47=67
4x=67-47
4x=20
x=20:4
x=5.........=> a=5+9.....=> a=14
b=5+15...=> b=20
c=5+11...=> c=16
d=5+12...=> d=17
14+20+16+17=
=34+33
=67
14-9=20-15=16-11=17-12....=> 4nr.egale
5 = 5 = 5 = 5
(a-9)=(b-15)=(c-11)=(d-12)=> 4nr.egale ....(a=b=c=d)
---------------------------------------
a=? b=? c=? d=?
notam: a=b=c=d...=> 4x...(4 nr.egale)....=> a=x+9; b=x+15; c=x+11 si d=x+12
adica....(a-9)+(b-15)+(c-11)+(d-12)= 4*x=4x
a) |____|+9
b) |____|+15
c) |____|+11
d) |____|+12
........................
4x++9+15+11+12=67
4x+24+23=67
4x+47=67
4x=67-47
4x=20
x=20:4
x=5.........=> a=5+9.....=> a=14
b=5+15...=> b=20
c=5+11...=> c=16
d=5+12...=> d=17
14+20+16+17=
=34+33
=67
14-9=20-15=16-11=17-12....=> 4nr.egale
5 = 5 = 5 = 5