16/21x - 2.48 = 3/7x - 1.18;

16/21x - 3/7x = 2.48 - 1.18;

16/21x - 9/21x = 1.3;

7/21x = 1.3;

1/3x = 1.3;

x = 13/10 * 3/1;

x = 39/10;

x 3.9.