Răspuns :
| a-3 | = 1 => a-3 apartine {-1,1} | +3
a apartine {2,4}
| -x-4 | = 5
|-x-4| = |x+4| ( proprietatea modulului )
|x+4| = 5 => x+4 apartine {-5,5} | - 4
x apartine {-9,1}
|3-6y|=12
|3-6y| = |-(6y-3)| = |6y-3|
|6y-3| = 12=> 6y-3 apartine {-12,12} | +3
6y apartine { -9,15} | : 6
y apartine { -3/2 ; 5/2 }
a apartine {2,4}
| -x-4 | = 5
|-x-4| = |x+4| ( proprietatea modulului )
|x+4| = 5 => x+4 apartine {-5,5} | - 4
x apartine {-9,1}
|3-6y|=12
|3-6y| = |-(6y-3)| = |6y-3|
|6y-3| = 12=> 6y-3 apartine {-12,12} | +3
6y apartine { -9,15} | : 6
y apartine { -3/2 ; 5/2 }
|a-3|=
a-3=1rez.a=1+4rez.a=5sau
a-3=-1reza=-1+4rez.a=3
|-x-4|=5rez.-x-4=5rez.-x=5+4rez.x=9sau
-x-4=-5rsz.-x=-5+4rez.x=-1
|3-6y|=12rez.3-6y=12rez.6y=12-3rez.6y=9rez.y=9:6rez.y=1,5sau
3-6y=-12rez.6y=-12÷3
a-3=1rez.a=1+4rez.a=5sau
a-3=-1reza=-1+4rez.a=3
|-x-4|=5rez.-x-4=5rez.-x=5+4rez.x=9sau
-x-4=-5rsz.-x=-5+4rez.x=-1
|3-6y|=12rez.3-6y=12rez.6y=12-3rez.6y=9rez.y=9:6rez.y=1,5sau
3-6y=-12rez.6y=-12÷3