AndraEzaruask
a fost răspuns

2. Afla termenul necunoscut.
(49:7) + a = 70
7+ a-10
a= 70
a 63
(a:6) + 25 = 31
(28:4) - a=2
7.- a=2
a s7 - 2
-5
(8 x a)- 26 = 30
a- (15:5)=9
0 - 319
A9 +3
as12
(72:a) + 48 = 56
6 x 4:a=8
7 x 7 - a=30
20-5x2=5
a:(2 x 3) = 4
8x4 +9xa = 86
(3 x 10+ 6 x7): a = 9
(48:6+ a):8=27:9
(20:a +20):6= 50: 10
(a:4+5):2=24:4
Urgent!!!!Va rooooooooooooog ​

Răspuns :

Cojocaruadelina2008ask

Explicație pas cu pas:

(49:7)+a=70

7+a=70/-7

a=63

(a:6)+25=31/-25

a:6= 6/•6

a=36

(28:4)-a=2

7-a=2

-a=7-2

-a=5/•(-1)

a=-5

(8•a)-26=30/+26

8•a=56/:8

a=7

a- (15:15)=9

a-1=9/+1

a=10

(72:a) + 48 = 56/-48

72:a= 8

a=9

6 x 4:a=8

24:a=8

a=3

7 x 7 - a=30

49-a=30

a=19

a:(2 x 3) = 4

a:6=4/•6

a=24

8x4 +9xa = 86

32+9•a=86/-32

9•a=64/:9

a=7,(1)

(48:6+ a):8=27:9

(8+a):8=3/•8

8+a=24/-8

a=16

(20:a +20):6= 50: 10

(20:a+20):6=5/•6

20:a+20=30/-20

20:a=10

a=2

(a:4+5):2=24:4

(a:4+5):2=6/•2

a:4+5=12/-5

a:4=7/•4

a=28

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