If it's not what You are looking for type in the equation solver your own equation and let us solve it.
s in (-oo:+oo)
-9 = (1/2)*s-13 // - (1/2)*s-13
13-((1/2)*s)-9 = 0
(-1/2)*s-9+13 = 0
4-1/2*s = 0 // - 4
-1/2*s = -4 // : -1/2
s = -4/(-1/2)
s = 8
s = 8
| x+1/5-2=-4/x | | 3(2x-1)-11x=-3x+5 | | a+a+a+8+2=6+3+3a+a | | 7x+11=5x+15 | | 3x*2+6x=9 | | 9x+229=4x+129 | | 3e/5=3 | | (3x-6)/(2x-2) | | -2+32=x+14 | | 16=x/6-8 | | x^^2/3=16 | | 8b+4=3 | | ln(x)=4.1+ln(7.9) | | 5x-17=4c+36 | | 1/3t-9=40 | | 3x(x-5)-7x^2+16x=0 | | 3n+13=4 | | t/5-2=10 | | log(-5x)=log(4x-9) | | 5x+5+x=77 | | log-5x=log(4x-9) | | 4x+2(4x-3)=138 | | K^2-3k-2=0 | | p(5)=3x^2+5x-4 | | 5x+9-4x=16 | | Y=ax-C | | 2(n-7)+3= | | 4f+8=8f-12 | | 2x-8x[9-4(x+3)]= | | 16t^2+12t^3=t^5 | | (6x+12)+(9x-4)= | | 50=7x-1 |