Question

Решите ! 1)3y+15> или равно 6 2)-6x+2< 14 3)2(2x+3)< 6 4)1-4x< 5

Answer 1

$1)3y+15 \geq 6$

$3y \geq 6-15$

$3y \geq -9$

$y \geq -3$

x∈(-∞;-3]

$2) -6x+2\ \textless \ 14$

$-6x\ \textless \ 14-2$

$6x\ \textgreater \ 12$

$x\ \textgreater \ 2$

x∈(2;+∞)

$3)2(2x+3)\ \textless \ 6)$

$4x+6\ \textless \ 6$

$4x\ \textless \ 0$

$x\ \textless \ 0$

x∈(-∞;0)

$4)1-4x\ \textless \ 5$

$-4x\ \textless \ 4$

$4x\ \textgreater \ -4$

$x\ \textgreater \ -1$

x∈(-1;+∞)