If it's not what You are looking for type in the equation solver your own equation and let us solve it.
31-x=87
We move all terms to the left:
31-x-(87)=0
We add all the numbers together, and all the variables
-1x-56=0
We move all terms containing x to the left, all other terms to the right
-x=56
x=56/-1
x=-56
| 43=91+s | | 3a+8=2a-5 | | k+89=56 | | 82=-b+33 | | 53=44+s | | 6x-10x=5x | | 2c+11=c+44 | | 5(2z+1)=3(z+4)-5 | | y+88=46 | | 16x+30=18x | | 15=-b+18 | | 7x+33=8x | | 32-x=84 | | 31=65+s | | (x^2+2/3)^2=27/9 | | 21=10x-4x | | 2x+41=3x+16=7x-24 | | 2h+55=h+5 | | (x+6)^=8 | | u+87=95 | | 32=-p+65 | | 3(8-r)=-3+6(r+6) | | 3(-8k-4)=-6(2+4k) | | 7y+2(6-y)=7 | | -4(-2x+1)+5x=6x+7(x+5) | | -4(k-3)-3(k+7)=2k | | -2x-2=-2x-2 | | 43-s=66 | | 43=54+u | | (100x)-(60x)=41164.38 | | (100x)-(60x)=41,164.38 | | 150-9x+9x-12=180 |