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) = -40 // + 40
x/(-2)+40 = 0
40-1/2*x = 0 // - 40
-1/2*x = -40 // : -1/2
x = -40/(-1/2)
x = 80
x = 80
| 3y^2-y-24=0 | | 9*(2/3)=6 | | 9x(2/3) | | Sqrt(20d)+5sqrt(125d)-2sqrt(45d)= | | sqrt(48x+32)= | | 7x-10y-8y+11x+6= | | 20=(1400-q)/49 | | 5(5)=4(3.14)r^2 | | 17+(-n)=160 | | 9x+12=3x+6 | | -x^2-2x-1=2x+3 | | X^2-100X+1600= | | 3*cos(2y)*cot(2y)=8 | | 6(8y-3)+8(3y-6)= | | 3t^2+8t+16=0 | | 1x+11forx=8 | | 66-12+9=1 | | 3/x=4/6= | | x^2-18x+8= | | 5(x+1)=3(x+4)-5 | | 2w-12=84 | | lw=42000 | | 4x+6x-5=x+40 | | [-26+(18)]+40= | | 2l+2w=820 | | (-4)(3)(-2)= | | 12x=123 | | -9-(7)+(-3)= | | 0.5/75 | | 0.2/82 | | x^2+10+12=0 | | 3x^3-2x^2+10=4x |