If it's not what You are looking for type in the equation solver your own equation and let us solve it.
m in (-oo:+oo)
(4/5)*m+4/7 = 4/7 // - 4/7
(4/5)*m+4/7-(4/7) = 0
(4/5)*m+4/7-4/7 = 0
4/5*m = 0 // : 4/5
m = 0
m = 0
| 5b+1/8=81/8 | | 5/8+3/4k=19/16 | | 8x+2x=55 | | 8x-15=x+13 | | 2x+2x=55 | | -2/5n+1/4=-19/20 | | 9-2/7a=431/49 | | 4/5t-2/5=-38/5 | | 2/5-1/2a=-51/10 | | 5n-3=-48 | | 1-5n=14/9 | | 3/4+4/5d=159/20 | | -7n+6=-22 | | 7w+7=28/3 | | 3+2/5a=31/5 | | 8-6a=-22 | | 1/5d+7/9=62/45 | | 1/2-4/7b=71/14 | | 5/8+2a=-91/8 | | -5/7t+3/5=321/35 | | 10+5x=25/2 | | 3b+6=27/5 | | 6/7d-5/9=289/63 | | 3-6/7b=15/7 | | 9/10+4b=281/90 | | 5/6n+9=113/12 | | -6/7b-4/5=-11/7 | | 3n+2/5=11/5 | | 6+6d=-36 | | 10n+17=3n+5n | | -2/3m-2=-10/7 | | -9+6a=-36/5 |