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)
2*r+2/4 = 4*r-(12/4) // - 4*r-(12/4)
2*r-(4*r)+2/4+12/4 = 0
2*r-4*r+2/4+12/4 = 0
7/2-2*r = 0 // - 7/2
-2*r = -7/2 // : -2
r = -7/2/(-2)
r = 7/4
r = 7/4
| 2X=3X+25 | | a/-3=8 | | x*2+2x=35 | | 8c+7+5=-35 | | y+4=60y | | X+6x-1=21+x | | -3(4-6a)=96 | | 5(1-2x)+8w=15 | | 8x+1-(4x+2)=3x | | (2/9)^-2 | | 7+3(5t+10)=67 | | 7-3x=-2x+8 | | -8x+59=-25-11x | | 3(3v+3)=81 | | (4c-3)(5c-6)= | | 3/1=12 | | 5(3x+6)+3x=18x-12 | | 3(a+4)-2=a+5 | | 5/x+4+12 | | -5-6(1+3y)=-23 | | 100y+10y=15y | | 16-81x^2=0 | | 2(pi)(r)=5(pi) | | 1/4x21 | | a+3/3=-10 | | p-(p+21)=7(p-3)+4p | | 10(x+2)+15=8x+7 | | y(100+10)=15y | | 12x-(7x-1)=66 | | 7(9a+3)=31 | | x+3.5=6.6 | | 3(x+4)=48 |