If it's not what You are looking for type in the equation solver your own equation and let us solve it.
a in (-oo:+oo)
6*a-(3*a)+8 = 29 // - 29
6*a-(3*a)-29+8 = 0
6*a-3*a-29+8 = 0
3*a-21 = 0 // + 21
3*a = 21 // : 3
a = 21/3
a = 7
a = 7
| -3-5x+4x=-8 | | 4a+3+a=3 | | -3x+4+7x=-24 | | -6=-5t-3t+10 | | 7+2t+5t=49 | | 9-2w+w=6 | | -4=2x+4(x-7) | | -3+6t+6t=21 | | k-3+6k=-38 | | 7-7a+5a=-3 | | -59=-2d-7d+4 | | 7(u+4)+4u=-38 | | -95=2d+7d+4 | | 7k+3+5k=-141 | | 4m+3+m=-2 | | 4(w-8)+4w=-16 | | 75=7x-x+3 | | 3-7x+5x=1 | | -7d+5-3d=-85 | | 18=6k+k-3 | | 5k+8+7k=104 | | 3+3d-7d=31 | | 4+6d+d=81 | | 3+2w+5w=38 | | 5=4k+k-5 | | 5t+5+t=41 | | 5b-10+4b=44 | | 7x+5+4x=16 | | 3-7k-6k=159 | | 44=-7a-5a+8 | | 2x+18=44 | | 2+6a+a=-61 |