If it's not what You are looking for type in the equation solver your own equation and let us solve it.
t in (-oo:+oo)
(2/7)*t+4 = 83/21 // - 83/21
(2/7)*t-(83/21)+4 = 0
(2/7)*t-83/21+4 = 0
2/7*t+1/21 = 0 // - 1/21
2/7*t = -1/21 // : 2/7
t = -1/21/2/7
t = -1/6
t = -1/6
| 5d+2/3=32/3 | | 5w+4=-16 | | 6d+2=50/7 | | -3/5b+7/10=13/25 | | -7/8-2/3x=-179/168 | | 5/6m+1/3=79/72 | | 1+4d=17 | | -1-2/3m=-9 | | -5/8+6/7b=13/56 | | -3/10+5k=69/20 | | 1/7+k=8/7 | | 5t+5=10/3 | | 5/7t+3/4=61/28 | | 2b-6=10 | | 3/5x+3/5=12/35 | | 7w-8=-25/4 | | -1/2b+7/9=77/18 | | -2/3-6k=55/12 | | 6t-1=37/11 | | -1/3t+3/8=-23/24 | | 3w+8/9=8/9 | | 5k+3/5=121/35 | | 2/7t+4=179/42 | | -2/3+3/5k=-37/15 | | -8+3/7a=-163/21 | | 3+2d=1 | | 3+3/4a=117/32 | | 5/6w-3/7=-71/84 | | 2w+5=20/3 | | 1/10+7d=1/10 | | 2+3a=-7 | | 6w+2/3=92/3 |