Question

..............va rog ajutati-ma​

Answer 1

a.

2x+2= -7x-21+9x-15-5

2x+2=2x-41

2=-41 FALS ⇒ x∈∅

b.

-9x-3+14=21x-9-10

-9x+11=21x-19

21x+9x=11+19

30x=30

x=1

c.

14+3-2x+6=37

23-2x=37

2x=-14

x=-7

d.

-4-(6-(-3-3-5-x-7)-9)=1

-4-(6+18+x-9)=1

-4-x-15=1

x=-20

e.

5·1+2x+2=-7x-21+9x-15+43

2x+7=2x+7

0=0 ADEVARAT ⇒ x∈R