If it's not what You are looking for type in the equation solver your own equation and let us solve it.
b in (-oo:+oo)
3*b+b+5 = -7 // + 7
3*b+b+5+7 = 0
4*b+12 = 0 // - 12
4*b = -12 // : 4
b = -12/4
b = -3
b = -3
| 421/280=4/7b+b+7/8 | | 5/7x-10+2x=101/7 | | 4x^3-8x=16 | | 2+2m+3/5m=29/8 | | d+2+7d=42 | | 5b+1/2+1/2b=3 | | -1.25*x^2=-11x+17 | | x+1/4+6x=-23/20 | | 290/3=a+7a+2/3 | | -7/11=-2t+6t-1 | | 6k+6+6k=2 | | 5-w+3/4w=27/4 | | 7a+2+1/2a=-28 | | 532/55=-a+2/5a+10 | | 3x+12-0.8x=3.4-0.8x-94 | | 44-6x+6=54+4x | | 3/4+a+2a=9/4 | | 2/7b+4/5-1/3b=716/945 | | -1+5/7k+5k=153/7 | | 4/5t+2/7+3t=268/7 | | -1/3+6/7a+3/4a=113/336 | | 2+3/5x+6x=-82/25 | | -1/2t+3/8+2/3t=5/12 | | 9x-39=42x | | 1.25*x^2=-11x+17 | | 9-39=42x | | 4+7t+7t=88 | | 12=7a+7a-2 | | 3+5/7t+t=10/7 | | 1-2/5t-7t=-49/25 | | 6+7k+6k=-111 | | 20=p/240 |