a) x/3 = 7/6 |•3
3•x/3 = 3•7/6
x = 7/2 = 3 1/2
b) x+2/4 = x/5 |•4
4•x+2/4 = 4•x/5
x+2 = 4x/5 |•5
5(x+2) = 5•4x/5
5x + 10 = 4x
5x-4x = -10
x = -10
