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) = 7 // - 7
a/(-4)-7 = 0
-1/4*a-7 = 0 // + 7
-1/4*a = 7 // : -1/4
a = 7/(-1/4)
a = -28
a = -28
| k+3/4=69/44 | | 5t=5/3 | | t/-3=4 | | 4w=12/5 | | 2=x+2 | | 3/8+x=27/8 | | 107/10=m-3/10 | | a-2/3=-7/6 | | t/2=6 | | m-4=-37/10 | | b+3=11 | | b/3=-1 | | 1/5+a=46/5 | | m/4=-1 | | 1/5+x=41/55 | | 3/2=a+3/4 | | -1/3a=2/33 | | 22/5=d-3/5 | | 20/x-2=10/x | | 4/5+k=22/15 | | t/6=-4/7 | | 7=d+7 | | n+5/8=29/8 | | k+6/7=55/7 | | 19/2=t-1/2 | | k+7=15 | | k+7/9=-83/9 | | d/3=4 | | t+7/10=77/10 | | 75/8=w+9 | | -1+n=-9/5 | | a-3/5=32/5 |