If it's not what You are looking for type in the equation solver your own equation and let us solve it.
k in (-oo:+oo)
(5/7)*k = 50/7 // - 50/7
(5/7)*k-(50/7) = 0
(5/7)*k-50/7 = 0
5/7*k-50/7 = 0 // + 50/7
5/7*k = 50/7 // : 5/7
k = 50/7/5/7
k = 10
k = 10
| 2/3n=2/5 | | 8+t=76/9 | | d+10=85/8 | | 1/2+a=-11/2 | | b+3/5=39/40 | | x-1/2=-9/2 | | n+1/3=4/3 | | -6=b-6 | | x+1=10/11 | | n+3/5=-2/5 | | 10+n=15 | | d+3/4=17/44 | | 5/7w=-5/28 | | -5/6+m=-7/6 | | b+10=59/6 | | 19/22=k+1/2 | | d+7/9=71/45 | | k+3/5=23/5 | | 3/8+m=1 | | -7/5=k-1/2 | | -7a=63 | | t-5/8=35/8 | | Y^2-2y+4=16 | | -3/4m=-6 | | -2/5+d=-72/55 | | 96/11=x+8 | | b+1/2=-1/6 | | a-8=-7 | | x+10=2-3 | | 5w=15/11 | | n/-7=-1 | | k+5/9=14/9 |