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+6*a+5 = -7 // + 7
6*a+6*a+5+7 = 0
12*a+12 = 0 // - 12
12*a = -12 // : 12
a = -12/12
a = -1
a = -1
| -5=6m-2m-5 | | -2+7m+m=-34 | | 24=-7x+3x+4 | | 5m+5+3m=77 | | 1-5k-4k=64 | | -4-4n-7n=29 | | 6t-7-3t=5 | | -43=-6a+a+7 | | 5n-5-7n=-5 | | 137=7d+5d+5 | | 2b+2+b=38 | | -4=x+x+4 | | -5+2d-7d=-60 | | 16=2d+7d+7 | | -4=-6k+4k-4 | | 6d+9-7d=5 | | -6m+4+5m=2 | | -6a+7+7a=7 | | 7-3b+4b=12 | | 6x+3+x=-60 | | 4a-3+a=32 | | 4+2a-3a=0 | | 105=4t+4t+9 | | 4b+7+6b=-33 | | 23=3k-k+3 | | 1=3k-7k+1 | | 2x-(7+x)=2 | | (35+5n)-(15+4n)= | | -t-2+3t=4 | | -6=-6d+4d+10 | | -5x+4-6x=92 | | 26=t+7t-6 |