Question

6. Afla numarul necunoscut:
a + 3 = 7
9 = a + 4
6 + a = 4
a + 3 = 8
a
a
_
a =
- 5 = 3 3
10 - a = 6
4 = 7 - a
9 - a = 5
a​

Answer 1

Răspuns:

a) a = 7-3 =4

a=4

b) 9=a+4

a= 9-4=5

a=5

c) 6+4=10

a = 10

d) a+3=8

8-3 =5

e) 38-5=33

a =38

f)10 -4 =6

g) 7-3=4

h) 9-4=5

Answer 2

a+3=7

a=7-3

a=4

9=a+4

a=9-4

a=5

6+a=4

a=4-6

a= -2

a+3=8

a=8-3

a=5

10-a=6

a=6-10

a= -4

4=7-a

a=4+7

a=11

9-a=5

a=5+9

a=14