Tìm x,biết 3(2x - 1) - 5(x - 3) + 6(3x - 4) = 24

Tìm x,biết:

a) 3(2x-1) -5(x-3) +6(3x-4) = 24

b) 2x2 + 3(x2 -1) = 5x (x+1)

c) 2x(5-3x) + 2x(3x-5) -3(x-7) = 3

d) 3x(x+1) -2x(x+2) = -1-x

e) 3x(x-2) -x(1+3x) = 14

f) 2x(x+3) -3(x2 + 1) = x+1 -x(x-2)

giúp mik nha !!!! :D