If it's not what You are looking for type in the equation solver your own equation and let us solve it.
k in (-oo:+oo)
9-(5/9) = 15-(k/15) // - 15-(k/15)
k/15-(5/9)-15+9 = 0
k/15-5/9-15+9 = 0
1/15*k-59/9 = 0 // + 59/9
1/15*k = 59/9 // : 1/15
k = 59/9/1/15
k = 295/3
k = 295/3
| (x-1)(x+5)=x^2+23 | | -4x=980 | | 1.00/5.00(750.00+d)=350 | | -15+.39m=14.95+.13m | | 1.00/5.00(750.00+d)=290 | | 18+80x-4=4x-4 | | 1+2(4)+3x=21 | | 4n+6=20 | | 0.18x+0.8(x-5)=0.01(4x-4) | | 256-9d=86+2d | | 1/5x-1/6(x-5)=6x | | (2p+7)/3=(p-1)/4 | | 4(x+2)+2(x+3)=6 | | 18.5+2.5x=47.75 | | 18.25+2.5x=47.75 | | (5+x)/3=(x+7)/5 | | 27750.00+200.00d=312.50d | | 53p=602-67p | | 53p=200 | | 9x-5y+3=5 | | (4y-4)/3+4=0 | | 3(4-5x)+3x-2=-14 | | x-2/2+x+1/8=5/6 | | 312.50d=50000.00 | | 27750.00+200.00d=50000.0 | | (X1/2)-2 | | x+3a=27+ax-6a | | 2x(x+4)=8 | | 2x(x+4)=32 | | (X-3)(x+2/3)=0 | | 70-y=10 | | 7x+12x=76 |