Question

VA ROG EX 5 E URGENNTT AM TIMP PANA MAINE LA 8 VA ROGGGGGGG DAU COROANA SI MULTE PINCTE

Answer 1

Răspuns:

Exercițiul 5 :

a) x+2y+13=24

x+2y=24-13

x+2y=11

18+2y+x=

=18+11=

=29

b) 3x+6y+19=43

3x+6y=43-19

3x+6y=24

6y+38+3×=

=38+24=

=62

c) 2x+2y+38=62

2x+2y=62-38

2x+2y=24

=> 4x+4y=(2x+2y)×2 => 4y+4x=24×2 => 4y+4x=48

4y+27+4x=

=48+27=

=75

d) 5x+18+20y=43

5×+20y=43-18

5x+20y=25

=> 15x+60y=(5x+20y)×3 => 15x+60y=25×3 => 15x+60y=75

15×+38+60y=

=75+38=

=113

e) 3x+2y+4z=30

4z+43+2y+27+3×=

=30+43+27=

=100

f) x+3+y+4+z+5=12

x+y+z+12=12

x+y+z=12-12

x+y+z=0

1012+x+y+z=

=1012+0=

=1012