Номера А2 А3 В1 ЕСЛИ МОЖНО ТО ВСЕ НОМЕРА

$A2.\quad \sqrt{-0,53(6,2a-24,8)}\; \; \to \\\\ -0,53(6,2a-24,8) \geq 0\; \; \to \quad 6,2a-24,8 \leq 0\\\\6,2a \leq 24,8\\\\a \leq 4\\\\a\in (-\infty ,4\, ]$

$A3.\quad \left \{ {{3x-15\ \textless \ x} \atop {4x+13 \geq 12}} \right. \; \left \{ {{2x\ \textless \ 15} \atop {4x \geq -1}} \right. \; \left \{ {{x\ \textless \ 7,5} \atop {x \geq -0,25}} \right. \; \Rightarrow \\\\-0,25 \leq x\ \textless \ 7,5\\\\x\in [-0,25\; ;\; 7,5\, )$

$B1.\quad \frac{3x-5}{7}-\frac{4x-1}{4}\ \textless \ 1\; |\cdot 28\\\\ 4(3x-5)-7(4x-1)\ \textless \ 28\\\\12x-20-28x+7\ \textless \ 28\\\\-16x\ \textless \ 41\\\\x\ \textgreater \ -\frac{41}{16}\\\\x\ \textgreater \ -2\frac{9}{16}$

Наименьшее целое х= -2 .