Question

решите системы неравенств номер 1030 (1) пожалуйста ​

Answer 1

$\left \{ {{20x+40\leq 0}\atop {\frac{2}{9}-\frac{4}{27}>0 }} \right. \\\\\left \{ {{20x\leq -40} \atop {-\frac{4}{27}>-\frac{2}{9} }} \right.\\\\\left \{ {{x\leq -40:20} \atop {-\frac{4}{27}>-\frac{6}{27} }} \right.\\\\\left \{ {{x\leq -2} \atop {x<-\frac{6}{27}:(-\frac{4}{27}) }} \right. \\\\\left \{ {{x\leq -2} \atop {x<-\frac{6}{27}*(-\frac{27}{4}) }} \right. \\\\\left \{ {{x\leq -2} \atop {x<-\frac{6}{1}*(-\frac{1}{4}) }} \right.$

$\left \{ {{x\leq -2} \atop {x<\frac{6}{4} }} \right.\\\\\left \{ {{x\leq -2} \atop {x<1,5} }} \right.$

x ∈ ( - ∞ ; -2 ]