If it's not what You are looking for type in the equation solver your own equation and let us solve it.
n in (-oo:+oo)
7*(6*n+6) = 336 // - 336
7*(6*n+6)-336 = 0
7*(6*n+6)-336 = 0
42*n-294 = 0
42*n-294 = 0
42*n-294 = 0 // + 294
42*n = 294 // : 42
n = 294/42
n = 7
n = 7
| 5(10+k)=80 | | 4(-4k+7)=92 | | 5(7+2a)=-15 | | 2(-5k-10)=70 | | 6(1x-6)=36 | | 5(10+3x)=5 | | 2(7a+6)=-128 | | 5(8-b)=30 | | 4(3b+2)=152 | | 5(4d+2)=70 | | m+2/3=2m-1/5 | | 2(-7x+9)=-94 | | 5(-3k+8)=25 | | 4(6-4k)=40 | | 6(5+4t)=30 | | 2(1-6x)=2 | | 5(u-1)-9=-4(-4u+5)-u | | -6a-4=44 | | -6a+4=44 | | 4(-2+5a)=-68 | | 6(-6-4x)=204 | | 2(10+4a)=36 | | 7(6+m)=77 | | 8-5i/-i | | 7(-7d-8)=140 | | 4r-9r=20 | | 4(-5m-4)=-16 | | 2(-2+5a)=116 | | 3(-6+7k)=3 | | 7(9-m)=-14 | | 2(4t-2)=-68 | | 5=3x^2-3x+2 |