If it's not what You are looking for type in the equation solver your own equation and let us solve it.
x in (-oo:+oo)
100-45 = x/3 // - x/3
100-(x/3)-45 = 0
55-1/3*x = 0 // - 55
-1/3*x = -55 // : -1/3
x = -55/(-1/3)
x = 165
x = 165
| -54.4/6.8 | | 5x+8y=48 | | x+3x+x+3x+10=180 | | x/5+13=16-1 | | (5u+8)(2+u)=0 | | 13=a-5.2 | | 4(y-5)(-y+1)=0 | | l=a/w | | (t*2)-2=t+23 | | 22+2x=319 | | 3y=15+6x | | (6/4/2)^2 | | j^2-20j-36=0 | | 3s+10(s-1.5)=24 | | (5/2x)=2.5x | | 20c=100 | | 7-h=7-h | | 7x^2+7x-11=0 | | 0.6(6x+12)=1.8-(x+2) | | 30=3n | | 5a-7=13 | | 1x+2x+3x=28.35 | | W-4.8=2.5 | | (u+4)(u+1)=0 | | 5/2x=2.5x | | 1=n-24 | | f(x)=-5x^2+4x+9 | | X-31=41 | | 3x+6x=78-42 | | 7/6*(-3/2)*6*2 | | 5x=3x+2x | | 6-3(1+8h)=29 |