Question

Rezolvări problemele 16 si 18
figurative

Answer 1

16. a=un segment
a+2=un segment plus 2 
a+2+2=un sement plus 2 +2
a+2+2+2=un segment plus 2+2+2
24-12=12 egalam segmente 12 = 2+2+2+2+2+2
12:4=3a 
3+2=5 a + 2 
3+2+2=7 a + 2+2
3+2+2+2=9 a+2+2
3+5+7 +9 =24
=8+7+9
=15+9
=24

Answer 2

16.
notam nr.
a=nr.1
b=nr.2
c=nr.3
d=nr.4

a+b+c+d=24

a= |-|
2
b= |-|------|
2 2
c= |-|--------|----------|
2 2 2
d= |-|--------|-------|---------|

a+b+c+d=24= 4a+ 12
4a=24-12
4a=12
a=12:4
a=3

b=3+2
b=5

c=5+2
c=7

d=7+2
d=9


18.


a+b+c+d+e=40
a+b+c=? nr. pare cons.
d+e=16 nr. impare cons.


a+b+c=40-16
a+b+c=24

a= |-|
b= |-|+2
c= |-|+2+2
a+b+c=24=3a+6
3a=18
a=18:3
a=6

b=6+2
b=8

c=8+2
c=10


d+e=16

d= |-|
e= |-|+2

d+e=16=2d+2
2d=14
d=14:2
d=7

e=7+2
e=9