Question

AJUTOR!!!! CA MA LEAGA TATA DE CALORIFER DAU COROANA DAU ORI CE !!! TOATE EX

Answer 1

Răspuns:

ex8.

a.

5x+11=66

5x=66-11

5x=55

x=55÷5

x=11

d.

x×(-7)=14

x=14÷(-7)

x=-2

g.

5x=-30

x=-30÷5

x=-6

j.

12x=-8+4x

12x-4x=-8

8x=-8

x=-8÷8

x=-1

b.

x÷(-3)=-12

x=-12÷(-3)

x=4

e.

35-x=23

-x=23-35

-x=-12

h.

14+2x=-26

2x=-26-14

2x=-40

x=-40÷2

x=-20

k.

7x-6=x

7x-x=-6

6x=-6

x=-1

c.

120÷x=-30

x=-30-120

x=-150

f.

4-3x=-35

-3x=-35-4

-3x=-39

x=-39÷(-3)

x=13

i.

25+5x=0

5x=25

x=25÷5

x=5

l.

-6+x=-x

x+x=-6

2x=-6

x=-6÷2

x=-3

ex9.

a.

5x-3=3x+11

5x-3x=11+3

2x=14

x=14÷2

x=7

c.

4x+13=3x+15

4x-3x=15-13

x=12

b.

-2x+15=-3x+9

-2x+3x=9-15

x=-6

d.

-47-17x=-9-16x

-17x+16x=-9+47

-x=38

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