Question

решите неравенство 3х-8≤7

Answer 1

$3x-8 leq 7$
$3x-8 leq 7|+8$
$3x-8+8 leq 7+8$
$3xleq 15$
$3xleq 15|*frac{1}{3}$
$3x*frac{1}{3}leq 15*frac{1}{3}$
$frac{3x}{3}leq frac{15}{3}$
$frac{3*x}{3*1}leq frac{5*3}{1*3}$
$frac{x}{1}leq frac{5}{1}$
$xleq 5$
$xin(+infty;5]$

Ответ: $(+infty;5]$