3x - 8 = -7
3x = -7 + 8 = 1
x = [tex]\frac{1}{3}[/tex]
4x - 2 = -2
4x = -2 + 2 = 0
x = 0
15x + 19 = 10
15x = 10 - 19 = -9
x = -([tex]\frac{9}{15}[/tex]) = -([tex]\frac{3}{5}[/tex])
3x - 8 = 2x + 4
3x - 2x = 4 - 8
x = -4
5x - 3 = 4x + 6
5x - 4x = 6 + 3
x = 9
7x - 9 = 6x - 8
7x - 6x = -8 + 9
x = 1