Propiedades del valor absoluto

1.│a│< b =" -b <>Si el valor absoluto es <>

Ej 1:
x - 3 < 7 =" -7 <>
Ej 2:
x² + 7x + 12 < 15 =" -15 <>2 + 7x +12 <>

2. │a│>b = b > a > -b