Question

qslant 50" align="absmiddle" class="latex-formula">

Answer 1

$80-2w \geq 50 \\ \\ 80 \geq 50+2w \\ \\ 80-50 \geq 2w \\ \\ 30 \geq 2w\quad \to \dfrac{30}{2} \geq w\quad \to \boxed{15 \geq w\to w\in (-\infty, 15 ] }$