College Algebra

I need help with some college algebra equations:

1] -0.9x-(0.5+0.1x) > -0.3x-0.5

2] solve for B: A= 24f/B(p+1)

3] 3*pi*x-(4th root of 3) = .75*pi*x + sqrt(19)

4] 4(0.23+sqrt(5)) + sqrt(2)*x+1

Thank You!