Решите уравнения: 0,1(х-8)=0,9. -9/44y=2 5/11. (3х-0,6) (х+0,2)=0.

[latex]1) 0,1x-0,8=0,9\\0,1x=0,9+0,8\\0,1x=1,7\\x=1,7/0,1\\x=17;[/latex] [latex]2) -\frac{9}{44}y=\frac{25}{11}\\y=\frac{25}{11}:(-\frac{9}{44})\\y=\frac{25}{11}*(-\frac{44}{9})\\y=-\frac{25*4}{9}\\y=-\frac{100}{9}\\y=-11\frac{1}{9};[/latex] [latex]3) (3x-0,6)(x+0,2)=0\\3x^2+0,6x-0,6x-0,12=0\\3x^2-0,12=0\\3x^2=0,12\\x^2=0,12:3\\x^2=0,04\\x=\frac{+}{}0,2;[/latex]