Question

Решите уравнения:|2-х|=7,|2-х|=0,|2-х|=-7

Answer 1

$a)|2-x|=7=\ \textgreater \ 2-x=-7=\ \textgreater \ 2+7=x=\ \textgreater \ x=9\\ |2-x|=7=\ \textgreater \ 2-x=7=\ \textgreater \ x=7-2=\ \textgreater \ x=-5\\\\ b)|2-x|=0=\ \textgreater \ x=0+2=\ \textgreater \ x=2\\\\ c)|2-x|=-7......\\ |2-x|=7=\ \textgreater \ 2-x=-7=\ \textgreater \ x=7+2=\ \textgreater \ x=9\\ |2-x|=7=\ \textgreater \ 2-x=7=\ \textgreater \ x=2-7=\ \textgreater \ x=-5$