If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( x )
x = 0
x = 0
x = 0
x in (-oo:0) U (0:+oo)
2/x+3 = (5/4)*x+25/8 // - (5/4)*x+25/8
2/x-((5/4)*x)-(25/8)+3 = 0
(-5/4)*x+2/x-25/8+3 = 0
2*x^-1-5/4*x^1-1/8*x^0 = 0
(2*x^0-5/4*x^2-1/8*x^1)/(x^1) = 0 // * x^2
x^1*(2*x^0-5/4*x^2-1/8*x^1) = 0
x^1
(-5/4)*x^2+(-1/8)*x+2 = 0
(-5/4)*x^2+(-1/8)*x+2 = 0
DELTA = (-1/8)^2-(2*4*(-5/4))
DELTA = 641/64
DELTA > 0
x = ((641/64)^(1/2)-(-1/8))/(2*(-5/4)) or x = (-(-1/8)-(641/64)^(1/2))/(2*(-5/4))
x = -2/5*((641/64)^(1/2)+1/8) or x = -2/5*(1/8-(641/64)^(1/2))
x in { -2/5*((641/64)^(1/2)+1/8), -2/5*(1/8-(641/64)^(1/2))}
x in { -2/5*((641/64)^(1/2)+1/8), -2/5*(1/8-(641/64)^(1/2)) }
| Y=1/2(-4)+3 | | Y=1/2(0)+3 | | X/4+5=-4 | | 3+x=9-x | | 9x+12=14x-28 | | 5x+x=5x+3 | | 2x-8=5(x-3)-4 | | 4/x-3=5/5-2 | | 6t-t-5=4t-7 | | -4(5x-8)+5=-20x+37 | | 5X+X^2=84 | | 3x+4c=49 | | x+9/16=7/8+x-4/6 | | 10p+9-11-p=-2(2p+4)-3 | | (3x/4)-(x-1/3)=11/12 | | 3/8=6/x | | 7x+15=9x-21 | | 2x-5=2(x-5) | | 3x/4-x-1/3=0 | | 2c^2+19c+42=0 | | 5/11+y/3 | | 4y-21=2y+1 | | 6x-8=-8x+20 | | 6x^2+1x-1=0 | | 4(6x-7)=24x-28 | | 20w^2+w=12 | | 11x^2+17x+6=0 | | -3/5+7/9-3/10 | | 11y/24-3/8 | | -2g(g+6)=g+3+2g | | 5/17+9/x | | 5/6+8/x |