Question

Resolva as equações :
a) 3/5-7=x+10
b) 4x-1=x/4+1/2
c) -x+2/2=8x+10/4

Answer 1

a) 3/5-7=x+10 
     (3 - 35)/5 = x + 10
       -32/5 - 10 = x
      (-32 - 50)/5 = x
       x = -82/5

b) 4x-1=x/4+1/2
     4x - x/4 = 1/2 + 1
     (16x -x)/4 = (1 + 2)/2
      15x/4 = 3/2
      15x = 12/2
      x = 6/15
      x = 3/5

c) -x+2/2=8x+10/4
    -x/2 + 1 = 8x + 10/4
    (-x/2 + 1)4 = 8x + 10
     -4x/2 + 4 = 8x + 10
      -2x + 4 = 8x + 10
       4 - 10 = 8x + 2x
        -6 = 10x
        x = -6/10