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afla valoarea termenului necunoscut :a) 1×2×3×a=24

Afla Valoarea Termenului Necunoscut A 123a24 class=

Răspuns :

1x2x3xa=24
1x2x3=6
6xa=24
a=24:6
a=4

bx2x5=40
bx10=40
b=40:10
b=8

c:2:3=5
c:2=3x5
c:2=15
c=15x2
c=30

27:3:3xd=6x4
9:3xd=24
3xd=24
d=24:3
d=8 

e:8+2000=2003
e:8=2003-2000
e:8=3
e=3x8
e=24

(6x6-27)xf=81
36-27=9
9xf=81
f=81:9
f=9

(394-123-g):2=108
271-g=108x2
271-g=216
g=271-216
g=55

6x5:10+h=296
3+h=296
h=296-3
h=293

[(124+692)-400x2]:i=4
(816-800):i=4

16:i=4
i=16:4
i=4

(24:3+45:5)+143=4xj+124
17+143=4xj+124
4xj+124=160
4xj=160-124
4xj=36
j=36:4
j=9

12x2:k=4
24:k=4
k=24:4
k=6

(4xl+5)-6x2=5
(4xl+5)-12=5
4xl+5=17
4xl=17-5
4xl=12
l=12:4
l=3

m:7+(123x3-53x4)=164
m:7+157=164
m:7=164-157
m:7=7
m=7x7
m=49

(n-45:9)x3=2185-2164
(n-5)x3=21
n-5=21:3
n-5=7
n=7+5
n=12

(24-7x3)x5x2:o=30:10
3x5x2:o=3
30:o=3
o=30:3
o=10

(p-28:7+200)x5=32 000+3x10
(p-4+200)x5=32 000+30
(p-4+200)x5=32 030
p-4+200=32 030:5
p-4+200=6406
p-4=6406-200
p-4=6206
p=6206+4
p=6210

923-q+145=693
923+g=693-145
923+q=548
q=923-548
q=375

rxr+648=7x100+2x10+3x3
rxr+648=729
rxr=729-648
rxr=81
9x9=81
r=9