If it's not what You are looking for type in the equation solver your own equation and let us solve it.
x in (-oo:+oo)
((5*x)/2)*x = 3*x // - 3*x
((5*x)/2)*x-(3*x) = 0
((5*x)/2)*x-3*x = 0
5/2*x^2-3*x = 0
DELTA = (-3)^2-(0*5/2*4)
DELTA = 9
DELTA > 0
x = (9^(1/2)+3)/(2*5/2) or x = (3-9^(1/2))/(2*5/2)
x = 6/5 or x = 0
x in { 0, 6/5 }
| (6x-147)=60 | | -2x-8=7x-10x | | in(y)=0.7+0.5(5) | | (6x-147)=90 | | -4y+12=4(2y+4) | | 16-4t=24 | | -7x-188=2x+55 | | (6x-147)=120 | | x3=512/729 | | 12cos^2x+5cosx-3=0 | | 6x-2(-3x-2)=59 | | 2x+14=30x-0.000000001 | | -7w+b(w+1)=w-7 | | 2x+14=30x-0.000000002 | | 3x^2+70x-552=0 | | 2x+14=30x-0.000000003 | | 26n-90=144 | | 2x+14=30x-0.000000004 | | 2x+14=30x-0.000000007 | | -40-15m=-8m+2 | | (5x/2x)=3x | | 2x+14=30x-0.000000009 | | 5x-3x-6=-24 | | 49x+7=0 | | 2x+14=30x-0.00000001 | | 2x+14=30x-0.00000003 | | x-43=6(2x+3)-6 | | 2x+14=30x-0.00000006 | | -3p=6/11 | | -2(w+10)=6w+12 | | 2x+14=30x-0.00000009 | | 2m+15+2p= |