Răspuns:
x=7
a) |x|=7 =>
x=-7
x=5
b) |-x|=|-5|) =>
x=-5
x+1=3 x=3-1 x=2
c) |x+1|=3 => => =>
x+1=-3 x=-3-1 x=-4
x-2=3 x=3+2 x=5
d) |x-2|=3 => => =>
x-2=-3 x=-3-2 x=-1
-x+3=7 -x=7-3 -x=4
e) |-x+3|=7 => => => înmulțim cu (-1)
-x+3=-7 -x=-7-3 -x=-10
si va fi =>x=-4
x=-10
-2x+1=15=14 x=14/2 x=7
f)|-2x|+1=15 => =>
-2x+1=-15=-16 x=-16/2 x=-8
2x-3=11 2x=11+3 x=7
g) |2x-3|=11 => =>. =>
2x-3=-11 2x=-11-3 x=-7
-2x+2-4=16. -2x=20 x=10
h) |-2x+2| -4=16 =>. => =>
-2x+2-4=-16 -2x=-20. x=-10
14+x+4=8. 14+x=4 x=4-14 x=-10
i) 14-|-x+4|=8 =>. =>. =>. =>
14+x+4=-8. 14+x=-4 x=-4-14 x=-18
Sper ca te-am ajutat. SUCCES!!
