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)
(-2/3)*x = 8 // - 8
(-2/3)*x-8 = 0
-2/3*x-8 = 0 // + 8
-2/3*x = 8 // : -2/3
x = 8/(-2/3)
x = -12
x = -12
| -41/56=x-6/7 | | x+3/7=5/77 | | x/-7=-3 | | x2/3-7x1/3+6=0 | | 1/2*29*10 | | 33/5=x+6 | | 7/9+x=115/9 | | x/-3=-3 | | -4/9+x=10/99 | | x-1=-1/4 | | -x=-11/12 | | x2/5-10x1/5+9=0 | | -2/7+x=54/7 | | x+3/8=35/8 | | x/6=-5/7 | | x+2/9=-25/9 | | -1/2x=-9/20 | | -52/7=x-8 | | -1/6=x+5/6 | | x+3=25/8 | | x+1=19/12 | | 4x=28/11 | | 62-19x=49-5.8x | | x-2/3=13/3 | | 3+x=19/5 | | 2/7+x=20/21 | | 5/9+x=52/45 | | 7x=-7/3 | | -14/3=x-5 | | 9+x=15 | | 43/42=x+6/7 | | -1/4=x+1/2 |