Question

Решите неравенство 7x-4(2x-1)<-7

Answer 1

$7x-4(2x-1)\ \textless \ -7\\ 7x-8x+4\ \textless \ -7\\ -x\ \textless \ -7-4\\ -x\ \textless \ -11 |*(-1) \\ x\ \textgreater \ 11$
x∈(11; +∞)