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)
6/12 = n/42 // - n/42
6/12-(n/42) = 0
1/2-1/42*n = 0 // - 1/2
-1/42*n = -1/2 // : -1/42
n = -1/2/(-1/42)
n = 21
n = 21
| -4/5*(4a-1)=28 | | F(x)=-3x-8f(2) | | 5+4/x | | 3/x+2/5 | | 5/x-2/x | | 3/5(30x) | | 12(4x-8)=4(12x+9) | | 6+8n-4=9n+32-7n | | 2/5n+4=20 | | X/32-18=-3 | | 7m+8m=120 | | 5v^2+3v=0 | | N+4-9-5m= | | 6(2x-5)=54 | | 2[2x-(6x-3)]=4-(2x-12) | | x+5.5=40 | | (7m^2+3m-4)-(3m^2+9-5)= | | 15+10x=105 | | 2=5j-28 | | 6a^2+5a-6/2a+3 | | 10(15+x)=105 | | 10x-105=15 | | 21-7/2x | | -3(4b+2)+(13b-9)=0 | | 1=10k-39 | | 16+2w=-11 | | 3/4x+5=11 | | 6v^2-19v+10= | | 2.9q-3.6-5.8q=-3.9q-4.7 | | 6-1x=14 | | 62c+86=32 | | 6c+86=32 |