Răspuns:
a) 2-(x+1)=-7(x+3)+3(3x-5)-5 =
2-x-1=-7x-21+9x-15-5=
1-x=2x-41=
-x-2x=-41-1=
-3x=-42=
x=14
b)-3*(3x+1)+14=3(7x-3)-10=
-9x-3+14=21x-9-10=
-9x+11=21x-19=
-9x-21x+-19-11
-30x=-30
x=1
c)a sati scriu de la primu egal
16-(3-2x+6)impartit2=37
16-(9-2x)impartit2=37
16-(9-2x)/2=37
32-(9-2x)=74
32-9+2x=74
23+2x=74
2x=74-23
2x=51
x=51/2 sau 25,5
d)
4-[6-(-3-3-5-x-7)-9]=1
4-[6-(-18-x)-9)=1
4-(6+18+x-9)=1
4-(15+x)=1
4-15-x=1
-11-x=1
-x=1+11
-x+12
x=-12
e)
35x-5+2x+2=-7x-21+9x-15+43
37x-3+2x+7
37x-2x=3+7
35x=10
x=2/7 sau 0,28
Explicație pas cu pas: