1) 7x - 0.5 = 6 - 1.5$2x+1$ 7x - 0.5 = 6 - 3x - 1.5
7x - 0.5 = 4.5 - 3x
10x = 5
x = 0.5

2) 0.6x + 1.2 = 0.8x
0.6x - 0.8x = -1.2
-0.2x = -1.2
x = -1.2 / -0.2
x = 6

3) 2.5x + 0.73 = 3x - 0.03
2.5x - 3x = -0.73 - 0.03
-0.5x = -0.76
x = -0.76 / -0.5
x = 1.52