Răspuns:
a)2(x+1)= -7(x+3)+3(3x-5)-5=
2x+2= -7x-21+9x-15-5
2x+2=2x-41
2x-2x=-39
x€R
b) -3(3x+1)+14=3(7x-3)-10
-9x-3+14=21x-9-10
-9x+11=21x-19
11+19=21x+9x
30=20x
x=30/20
x=3/2
c)14+2[3-2(x-3)]:2=37
14+2(3-2x+6):2=37
14+3-2x+6=37
14+9-2x=37
23-2x=37
-2x=37-23
-2x=14
x=14/ -2
x=-7
d)-4-{6-[-3+(-3)+(-5-x)-7]-9}=1
-4-[6-(-3-3-5-x-7)-9]=1
-4-(6+18-x-9)=1
-4-(6+9-x)=1
-4-6-9+x=1
-19+x=1
x=1+19
x=20
e)5(7x-1)⁰+2(x+1)= -7(x+3)+3(3x-5)+43
5×1+2x+2= -7x-21+9x-15+43
5+2x+2= 2x-36+43
7+2x=2x-7
2x-2x=-7-7
x€R
