If it's not what You are looking for type in the equation solver your own equation and let us solve it.
d in (-oo:+oo)
d/7 = -1 // + 1
d/7+1 = 0
1/7*d+1 = 0 // - 1
1/7*d = -1 // : 1/7
d = -1/1/7
d = -7
d = -7
| w+5/6=-13/6 | | b/7=-6 | | 9=t+7 | | 3/10+w=81/70 | | b/4=-4 | | b-1/9=62/9 | | 4/5+t=2/5 | | 39/5=x-1/5 | | t-4/9=77/9 | | t+1=0 | | t-2=-10 | | 5/9+k=41/9 | | n-2/7=-1/28 | | x^9= | | k+7=71/11 | | m/4=7 | | w+7=79/12 | | 10+t=16 | | -4/9+b=32/9 | | 11/35=n-2/7 | | 1+k=10/9 | | w/-4=-1 | | 113/10=w+3/10 | | k-4/5=-13/10 | | -5/6+b=43/6 | | k/-6=-7 | | 2t=-14 | | a+3/4=7/6 | | -3/4w=1/3 | | 1+b=-2 | | 7=d+6 | | m/5=-4 |