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+6/4 = 2*r-(6/2) // - 2*r-(6/2)
2*r-(2*r)+6/4+6/2 = 0
2*r-2*r+6/4+6/2 = 0
9/2 = 0
r belongs to the empty set
r belongs to the empty set
| 1/4x^2+9=0 | | (d^3+4d^2+5d)y=0 | | -1/3(81/7) | | -9-(-3-5t)=-3(7t+4) | | 0.5x-.01(6-x)=2.7 | | 3x-2(x+1)=-3 | | (-3/4)^2 | | (2q4/7)4 | | 2x+8x-72=58 | | 6a-5/7 | | 3w^2=27 | | graphx=3+3y | | 161-2x=43x+21 | | -29-b=7(8b+4) | | 6x-108+x=46 | | 5=18-3x | | x^2-15=15 | | 7x^2+22x+16=0 | | 3+2p-2=8p+9-4p | | 5x-4=8x-11 | | 263-7x=38x+23 | | 16x^2-14x-15=0 | | -2x+10x-(96)=88 | | 10(3x+4)-5(4x+9)=2(5x+4)-13 | | -2x+10x-96=88 | | -24x^2-28x+40=0 | | 6x^5-42x^4+60x^3=0 | | (-3/4)2 | | -24x^2-10x+56=0 | | Ln(X-25)=ln(x)-ln(25) | | x/10=x/3 | | -3x-(55)+12x=71 |