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)
150 = 7*a+5*a+6 // - 7*a+5*a+6
150-(7*a)-(5*a)-6 = 0
150-7*a-5*a-6 = 0
144-12*a = 0 // - 144
-12*a = -144 // : -12
a = -144/(-12)
a = 12
a = 12
| -4a+9+3a=-1 | | 2-6m+7m=-3 | | 0=-5t+4t+5 | | -4+6m+3m=104 | | -59=7b+2b+4 | | 3w+5-w=15 | | -8=-3n+n-4 | | -1-5a-3a=63 | | 1+2x+x=31 | | 2k+3+3k=38 | | -2-4k-7k=108 | | -2=6k+4k+8 | | -6m+6-5m=-16 | | 8+3t-5t=8 | | -9-3t+4t=-2 | | 3t-5+t=-37 | | 63=-2k-4k+9 | | 3k+4+3k=22 | | -7-x-6x=-70 | | k+2+6k=-61 | | -1-w-5w=-55 | | 5+7b-b=-13 | | 1+6t-t=1 | | -8+3x+2x=-3 | | 7+4x-6x=23 | | -2a+6+5a=33 | | -5x+6+4x=3 | | 8+6n+4n=68 | | 2=-m+2m+6 | | 74=x+7x+2 | | 12=3k+4k-2 | | -2+4w-7w=28 |