Алгебра 8 класс учебник Макарычев, Миндюк ответы – номер 1053

а) $$ \left\{\begin{array} { l } { 0 , 3 x - 1 < x + 0 , 4 } \\ { 2 - 3 x < 5 x + 1 } \end{array} \left\{\begin{array}{l} 0,3 x-x<0,4+1 \\ -3 x-5 x<1-2 \end{array}\right.\right. $$ $$ \left\{\begin{array} { l } { - 0 , 7 x < 1 , 4 } \\ { - 8 x < - 1 } \end{array} \left\{\begin{array} { l } { x > 1 , 4 : ( - 0 , 7 ) } \\ { x > - 1 : ( - 8 ) } \end{array} \left\{\begin{array}{l} x>-2 \\ x>\frac{1}{8} \end{array}\right.\right.\right. $$

    (1/8; +∞)
б) $$ \left\{\begin{array} { l } { 2 , 5 x - 0 , 1 2 > 0 , 6 x + 0 , 0 7 } \\ { 1 - 2 x > - x - 4 } \end{array} \left\{\begin{array} { l } { 2 , 5 x - 0 , 6 x > 0 , 0 7 + 0 , 1 2 } \\ { - 2 x + x > - 4 - 1 } \end{array} \left\{\begin{array}{l} 1,9 x>0,19 \\ -x>-5 \end{array}\right.\right.\right. $$ $$ \left\{\begin{array} { l } { x > 0 , 1 9 : 1 , 9 } \\ { x < - 5 : ( - 1 ) } \end{array} \left\{\begin{array}{l} x>0,1 \\ x<5 \end{array}\right.\right. $$

    (0,1; 5)
в) $$ \left\{\begin{array} { l } { 3 ( x - 2 ) ( x + 2 ) - 3 x ^ { 2 } < x } \\ { 5 x - 4 > 4 - 5 x } \end{array} \left\{\begin{array} { l } { 3 x ^ { 2 } - 1 2 - 3 x ^ { 2 } - x < 0 } \\ { 5 x + 5 x > 4 + 4 } \end{array} \left\{\begin{array}{l} -x<12 \\ 10 x>8 \end{array}\right.\right.\right. $$ $$ \left\{\begin{array} { l } { x > 1 2 : ( - 1 ) } \\ { x > 8 : 1 0 } \end{array} \left\{\begin{array}{l} x>-12 \\ x>0,8 \end{array}\right.\right. $$

    (0,8; +∞)
г) $$ \left\{\begin{array} { l } { ( x - 4 ) ( 5 x - 1 ) - 5 x ^ { 2 } > x + 1 } \\ { 3 x - 0 , 4 < 2 x - 0 , 6 } \end{array} \left\{\begin{array}{l} 5 x^2-x-20 x+4-5 x^2-x>1 \\ 3 x-2 x<-0,6+0,4 \end{array}\right.\right. $$ $$ \left\{\begin{array} { l } { - 2 2 x > 1 - 4 } \\ { x < - 0 , 2 } \end{array} \left\{\begin{array} { l } { x < - 3 : ( - 2 2 ) } \\ { x < - 0 , 2 } \end{array} \left\{\begin{array}{l} x<\frac{3}{22} \\ x<-\frac{1}{5} \end{array}\right.\right.\right. $$

    (-∞; 3/22)