If it's not what You are looking for type in the equation solver your own equation and let us solve it.
15+n=31
We move all terms to the left:
15+n-(31)=0
We add all the numbers together, and all the variables
n-16=0
We move all terms containing n to the left, all other terms to the right
n=16
| 8^3x=(1/16)^-x-1 | | 9^2x=-87 | | |2x|+19=13 | | 12/17=120/x | | 2a^+9a=11 | | 12/17=120/n | | p-19=-33 | | -18g=18 | | 19+v=3 | | 19-v=3 | | 10x-(3x-7)=42 | | 12=-2=x | | (3*54-2n+18)*2+2n=360 | | 8(a-3=) | | (3*54-2n+18)*2+2n=260 | | 6=b-6 | | -4h-6h+-10h-2=-18 | | 11-(s-8)=15 | | 19-7x=-65 | | 2844=36(p+15) | | 5(2n-3)=27 | | (x-3)^4=21 | | -21=b+(-18) | | 5x+10x+15=90 | | 2(d+9)=2(d-4) | | 12y=64+5y | | -(m-2)=-4 | | 3x+4=10÷4 | | -14=m-18 | | F(t)=6t+12t | | 2x+1+3x+1=17 | | 4-7=304-x/x |