If it's not what You are looking for type in the equation solver your own equation and let us solve it.
a in (-oo:+oo)
a/(-4) = -2 // + 2
a/(-4)+2 = 0
2-1/4*a = 0 // - 2
-1/4*a = -2 // : -1/4
a = -2/(-1/4)
a = 8
a = 8
| 35+4x=180 | | b-10=-1 | | b+8=16 | | 9+a=16 | | 5d=0 | | r-2[1-3(2r+4)]=61 | | 5(9x-5)=7(6x+2) | | 8=a+2 | | (X+6)x=76 | | 13=m+5 | | t+7=6 | | d-4=0 | | 1+t=6 | | 2(x-4)+4x=10-3x | | -6t=24 | | w-5=-14 | | -7b=70 | | 9+a=8 | | w-7=-5 | | 3x=8+9x | | 5+a=-7 | | 10+n=12 | | -7+a=-10 | | t+7=19 | | 7(3x+2)=4(4x+11) | | d-2=-8 | | 3d=-33 | | m+10=7 | | 5(x+4)=4(x-1) | | 7+n=-3 | | t/-5=7 | | 7(5x-4)=11(4x-5) |