Question

Ayuda con estos ejercicios por favor

Answer 1

17) 2amx - 4a = 5mx + m - 2ax
 
      2amx + 2ax - 5mx = m + 4a
      
      x ( 2am + 2a - 5m) = m + 4a
 
      x = (m + 4a) / (2am + 2a - 5m)

18) y^2 - 5xy + 12y = 6y - 10x + 3
       
           10x - 5xy = 6y -12y + 3 - y^2
    
            5x ( 2 - y) = 3 - 6y - y^2
 
               x = (3 - 6y - y^2) / 5(2 - y)


19) (3/4)cbx - (1/2)b = (1/2)bx  - (1/8)cx + (1/4)cb
 
      (3/4)cbx - (1/2)bx + (1/8)cx = (1/4)cb + (1/2)b

             x (3/4 cb - 1/2 b + 1/8 c) = (1/4)cb + (1/2)b

             x (6cb - 4b + c)/8 = (cb + 2b)/4

             x (6cb - 4b + c) = 2b (c + 1)

            x = 2b(c+ 1) / (6cb - 4b + c)


20) (2/5)nx - (n^2)/6 + x/10 = 7/15 - x/3 + nx/2
 
        (2/5)nx + x/10 + x/3 - nx/2 = 7/15 + (n^2)/6
 
             nx (4 - 5)/10 + x (3 + 10)/10 = 7/15 + (n^2)/6
 
              -nx/10 + 13x/10 = 7/15 + (n^2)/6
 
                   x (13 - n)/10 = 7/15 + (n^2)/6
 
                       x = [10/(13 - n)] (7/15 + (n^2)/6)