Question

$|2x+3| textless 9$ пж срочно нужна

Answer 1

$|x| textless aquad Rightarrow quad -a textless x textless a\\|2x+3| textless 9\\-9 textless 2x+3 textless 9\\-12 textless 2x textless 6\\-6 textless x textless 3\\xin (-6,3)$