a) 5x + 4 = 10
5x = 10 - 4
5x = 6 /: 5
x = [tex]\frac{6}{5}[/tex]
x = [tex]1\frac{1}{5}[/tex]
b) 3x - 5 = 9
3x = 9 + 5
3x = 14 /: 3
x = [tex]\frac{14}{3}[/tex]
x = [tex]4\frac{2}{3}[/tex]
c) -2x + 3 = 7
-2x = 7 - 3
-2x = 4 /: (-2)
x = [tex]\frac{4}{ -2}[/tex]
x = -2
-4x - 3 = 13
-4x = 13 + 3
-4x = 16 /: (-4)
x = [tex]\frac{16}{-4}[/tex]
x = -4
