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)
-x/2 = 10 // - 10
-x/2-10 = 0
-1/2*x-10 = 0 // + 10
-1/2*x = 10 // : -1/2
x = 10/(-1/2)
x = -20
x = -20
| -tan(x)=tan(-x) | | (-x/10)+(5x-6)/8=2x-7 | | (-x-3)/5=(y-7)/2 | | (-x-11)/3=21 | | (-x+3)*2/(-2)=4 | | (-x+2)(2x-5)/x+1=0 | | (-x+10)/(-5x)=1.02 | | (-x)-11/3=21 | | -43.7=12.5+g | | x^2+7x+10=-27 | | (-t)/7+5=16 | | -4y-x=1 | | (-9/8a)=36 | | (-9/4)=(3x/20) | | -18g-6-33g= | | (-9/2y)-5y=22 | | (-9/10)-6x+3x=(-99/10) | | 9y+3y=24 | | (-9)+x/3=51 | | (-8x-7)/3=11 | | 1=5x6+2x3 | | (-8/6x-12)=(2x/x-2)+(x+3/3x-6) | | (-8/5)-(7/3)v=1/2 | | (-8/3n)+3n=24 | | (-8/3)n+3n=24 | | (-8+149/17)/2=x | | 3(8-4b)-6b= | | (-7/6)x=(1/3) | | (-7/5v+10)+1=(3/v+2) | | (-7/5)x-(2/5)=(5/7)x-(62/7) | | (-7/3v)-(5/3)=2v-(3/2) | | x^2-5x-100=0 |