If it's not what You are looking for type in the equation solver your own equation and let us solve it.
w in (-oo:+oo)
9 = w/4-4 // - w/4-4
4-(w/4)+9 = 0
13-1/4*w = 0 // - 13
-1/4*w = -13 // : -1/4
w = -13/(-1/4)
w = 52
w = 52
| x^2-3.16=0 | | -13m-4=2 | | 3t+9=31 | | -0.4=(100-X)*1/0.5*150 | | 8A=-1+7A | | 6y+7x=160 | | l=(1000)(13)(7) | | -0.4=(100-X)*1.5/0.5*X | | 4(x+4)-6x=28 | | 4Y-3(Y-6)+5=7 | | 5(u+9)=-3u-19 | | 7x-5=2(x+1)+5-7 | | 3t^4-9t+6=0 | | 4(x+1)=7+4x | | 4/3(t-1)-1/6(4t-3)=-2 | | P=2(13)+2(42) | | 4t-5/6=6 | | x(100x^3+65x^2-86x-24)=0 | | -4=-k/3 | | -5x^2+9x+17=0 | | (6x/5)-x=(x/15)-(10/3) | | x^3/x^1 | | 9g=27 | | 45x^2-x^3/45-x | | 8=r/7 | | -0.4=(X-100)*1.5/0.5*X | | 4t^3-6=0 | | x^2/45-x | | 25X^2-30X+9=125 | | 7x-17=3x+3 | | 48x^3+40x^2-33x-10=0 | | 7(x-3)-29=9x-2(x-2) |