If it's not what You are looking for type in the equation solver your own equation and let us solve it.
r in (-oo:+oo)
(4*(2*r-2))/5 = 4*r-(1/4) // - 4*r-(1/4)
(4*(2*r-2))/5-(4*r)+1/4 = 0
(4*(2*r-2))/5-4*r+1/4 = 0
(4^2*(2*r-2))/(4*5)+(-4*4*5*r)/(4*5)+(1*5)/(4*5) = 0
4^2*(2*r-2)-4*4*5*r+1*5 = 0
5-48*r-32 = 0
-48*r-27 = 0
(-48*r-27)/(4*5) = 0
(-48*r-27)/(4*5) = 0 // * 4*5
-48*r-27 = 0
-48*r-27 = 0 // + 27
-48*r = 27 // : -48
r = 27/(-48)
r = -9/16
r = -9/16
| 6x-10=98 | | 4b=26-9b | | 7-12=z/-4 | | -3/7(y-21)-1/14y | | 7(2r-1)/5=7r-5/2 | | -17-6n=-7n-2(1+7n) | | 8x^2=80+3x^2 | | gx+b=sx+v | | gx+b=sx+vforx | | -1=-(2+9t)-10t | | (x-9)-(7x-4)= | | (3x+2)(3x+6)= | | 8(2r-2)/5=8r-1/6 | | 0.625-y=0.75 | | -0.75n=12 | | x-9-7x-4= | | -10-[(6-5)-(-5-9)]= | | 3a+4b=3.00 | | x-12=27 | | y=3(3y+1)+1 | | 52-x/8=x/5 | | 0.6z+z=0.6 | | 24y^2z^3/6z | | 8+7n=7n+8(1-8n) | | 3(x-5)-2(5x+4)=x-23 | | (-x^2)+6x-14=0 | | 3=0.3-2b | | 2x+3y+6+2x+5y-3= | | 6(x+14)-3x=68 | | 1/3x=10-12/4 | | 15-11y=-59 | | 2x^2+3x-72=0 |