Question

Как решить линейное уравнение |9х-18|=27

Answer 1

|9х-18|=27 = $left { {{9x-18=27 (x geq 0)} atop {-9x+18=27 (x leq 0)}} right. left { {{9x=45 (x geq 0)} atop {-9x=9 (x leq 0)}} right. left { {{x=5 (x geq 0)} atop {x=-1 (x leq 0)}} right.$