(2x - 3) * 10 = 5 * 9;

(2x - 3) * 10 = 45;

2x - 3 = 45 : 10;

2x - 3 = 4.5;

2x = 4.5 + 3;

2x = 7.5;

x = 7.5 : 2;

x = 3.75.