If it's not what You are looking for type in the equation solver your own equation and let us solve it.
w in (-oo:+oo)
3*w+w+9 = 25/2 // - 25/2
3*w+w-(25/2)+9 = 0
3*w+w-25/2+9 = 0
4*w-7/2 = 0 // + 7/2
4*w = 7/2 // : 4
w = 7/2/4
w = 7/8
w = 7/8
| -t+4+4t=5/2 | | 1/5-1/2w+3/7w=-18/35 | | 1/4m+2/7+5/7m=95/112 | | 4/5t-1-7t=367/5 | | -2/3a-3/4-1/3a=-51/4 | | 3/7w+4/7+w=-116/7 | | -317/63=4/7x-x+1/9 | | 7-5k-2/5k=91/40 | | 2/3-a+a=2/3 | | -3/10+3t-2/7t=-801/770 | | -9+5n+6n=-57/10 | | 7a+3/4+a=163/4 | | -1/2d-3/5-4d=-267/70 | | -7n-8+1/2n=31 | | -124/7=4d-6d+2/7 | | 204/49=6n+5/7n+8 | | 9/10+7x+x=969/10 | | 5-3w+4w=-4 | | 1/3+4/7d-1/3d=11/28 | | 9+3/4x+3/5x=171/10 | | 1/2-a+4a=13/4 | | 313/210=-5/6w+3/5w-1/7 | | 5t+1/4+3/5t=229/20 | | -6d+5/8+7d=-67/8 | | -3/7b-1/3+7b=65/12 | | 5a-1/6-a=-73/6 | | -587/10=-2/5w-7w+1/2 | | d+2/3-4/7d=32/21 | | 9+4t+1/6t=56/9 | | 6-3/4m-4m=53/12 | | -27/7=4/7n+1/7n-1 | | 7x-(2x+3)=9(x-1)-5 |