Question

Пожалуйста 50 баллов​

Answer 1

$1)\; \; \left \{ {{3(x-1)<x-3} \atop {5(x+3)>2x+3}} \right. \; \left \{ {{2x<0} \atop {3x>-12}} \right.\; \left \{ {{x<0} \atop {x>-4}}\right.\; \to \; \; x\in (-4,0)\\\\2)\; \; \left \{ {{2(y-2)\geq 3y+1} \atop {5(y+1)\leq 4y+3}} \right.\; \; \left \{ {{-5\geq y} \atop {y\leq -2}} \right.\; \; \left \{ {{y\leq -5} \atop {y\leq -2}} \right. \; \; \to \; \; y\in (-\infty ,-5\, ]$

$3)\; \; \left \{ {{3(2y-3)\leq y+6} \atop {4(3y+1)\geq 5y-10}} \right.\; \; \left \{ {{5y\leq 15} \atop {7y\geq -14}} \right.\; \; \left \{ {{y\leq 3} \atop {y\geq -2}} \right.\; \; \to \; \; y\in [-2,3\, ]$

$4)\; \; \left \{ {{2(3x+2)>5(x-1)} \atop {7(x+2)<3(2x+3)}} \right.\; \; \left \{ {{x>-9} \atop {x<-5}} \right.\; \; \to \; \; x\in (-9,-5)$