Question

Resolva a inequação: 3x/4 <2x/7

Answer 1

 3x      <   2x
-------      --------
   4            7

7.3x < 4.2x
21x < 8x
21x - 8x < 0
13x < 0
x < 0/13
x < 0

Answer 2

    3x/4 < 2x/7 ----mmc(4,7) = 28
    21x < 8x
    21x - 8x < 0
            13x <0
               x  < 0/13
               x < 0