Question

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Answer 1

Ex1:
I+II+III=36 lei
Ix2=II
(I+II)+6=III

I |----|
II |----|----|
III |----|----|----|+6

36-6=30
30:6=5 (I)
5x2=10 (II)
5+10+6=21 (III)

Verificare:
5+10+21=36

Ex2:
A, B, C=?
Ax3=B
Bx3=C
C-B=18

Bx3-B=18
3B-B=18
2B=18
B=18:2
B=6

Ax3=6
A=6:3
A=2

C-6=18
C=6+18
C=24

Ex3:
C1+C2=49
C1x2,5=C2
C1+C1x2,5=49
3,5C1=49
C1=49:3,5
C1=14
14+C2=49
C2=49-14
C2=35

14+35=49