If it's not what You are looking for type in the equation solver your own equation and let us solve it.
a in (-oo:+oo)
5/9 = a/1-(-4/5) // - a/1-(-4/5)
5/9-(a/1)-4/5 = 0
5/9-a-4/5 = 0
-a-11/45 = 0 // + 11/45
-a = 11/45 // * -1
a = -11/45
a = -11/45
| 40-5y/20 | | p=-60q^2+7200 | | x-8+x=182 | | -31.116+6.9m=0.3m-7.9(-6.9m+0.3) | | (5x^2y^-5/4y^-2)^5 | | x-10=3/5[9-10x] | | -5(-2x+7)+3=58 | | -5(-4x+4)+2=162 | | 3x+5+2x=1+4x | | 2/9x-4/1=2/3 | | Y=1/2x^2G6 | | Ax-9b=7c | | -(5x-9)+5x= | | (2x-20)=94 | | -(8x-8)+8x= | | 3(x+1)(x-4)(x+5)=0 | | 0=3(x+1)(x-4)(x+5) | | 68-2x=84-3x | | 4secx=16sinx | | -8z-8z=-4z+6-9z | | 7u+4=6u | | 2(3r+8)-3(r-9)= | | 9x^2+4y^2+6x=35 | | (3x-25)=(2x+33) | | x+y+18=40x-2=2y | | 3(3+3x)=8(x-3) | | (3x/5)-1=8 | | 69-2x=78-3x | | (X-8)+x=128 | | 10-11x-6-10x=7 | | x+40=590 | | 10-1x-6-10x=7 |