A mathematical problem helps to set up equations The title is: a glass of juice a total of 63 liters, pour out part of the full water, and then pour out the same part of the water juice, at this time there are still 28 liters of original juice in the cup, ask the first pour out how much juice? Is a binary equation, thank you for your help~~

A mathematical problem helps to set up equations The title is: a glass of juice a total of 63 liters, pour out part of the full water, and then pour out the same part of the water juice, at this time there are still 28 liters of original juice in the cup, ask the first pour out how much juice? Is a binary equation, thank you for your help~~

Let the inverted ratio be X
63*（1-X）^2=28
X=1/3
63X=21

The following equations are solved: (1) 0.04x + 0.090.05 − 0.3x + 0.20.3 = x − 52; (2) (5x-2) × 30% = (7x + 8) × 20%

(1) The deformation of the original formula is as follows: 4x + 95 − 3x + 23 = x − 526 (4x + 9) - 10 (3x + 2) = 15 (X-5) 24x + 54-30x-20 = 15x-75-21x = - 109, ｜ x = 10921; (2) the deformation of the original formula is as follows: 3 (5x-2) = 2 (7x + 8) 15x-6 = 14x + 16 ｜ x = 22

First question:
If all points on the curve C: x square + y square + 2ax-4ay + 5A square - 4 = 0 are in the second quadrant, then the value range of a is?
Second question
Given that point m is a moving point on line 3x + 4Y-2 = 0 and point n is a moving point on circle (x + 1) square + (y + 1) square = 1, then the minimum value of Mn is?

First question:
&Nbsp; & nbsp; & nbsp; X ^ 2 + y ^ 2 + 2ax-4ay + 5A ^ 2-4 = 0 & nbsp; & nbsp; can be reduced to (x + a) ^ 2 + (y-2a) ^ 2 = 4 & nbsp; & nbsp; from the meaning of the title, the curve is a circle, the center coordinates are (- A, 2a), the distance from the center to the X axis is 2a, the distance to the Y axis is a, and the radius of the circle is 2, then a & gt; 2
Second question:
&The coordinates of the center of the circle are (- 1, - 1), the distance between the center of the circle and the straight line is d = | 3 (- 1) + 4 (- 1) - 2) | / 5 & nbsp;, and the minimum value of & nbsp; | Mn | is
      d-r=1.8-1=0.8