If it's not what You are looking for type in the equation solver your own equation and let us solve it.
x+31+x+20+x=180
We move all terms to the left:
x+31+x+20+x-(180)=0
We add all the numbers together, and all the variables
3x-129=0
We move all terms containing x to the left, all other terms to the right
3x=129
x=129/3
x=43
| 10x+3=12x-17 | | 73/4-x=11/2 | | x-0.15=1/4 | | 120+120+120+110+x+(x+10)=720 | | 6n+4=4 | | 82+2x=94+x | | (5x-2)^2/x-3=4-20x+25x^2/24-11x+x^2 | | 6m^2-m-22=0 | | 3y+5=44=13 | | H=3+14t-5t2 | | 9×3^3x+4=9^x | | 3a+2=a-7 | | (-3/2)^12=(-9/16)-2x | | 7+8x=52x+31 | | 7+8x=52+31 | | 2/9=10/p-4 | | 8/5=3/x-8 | | 3(x+)=24 | | 1/3-x-2=3/5 | | m-1/5=4 | | n-10/8=9/3 | | (-9/16)^-2x=(-3/2)^12 | | x/x+3=3/5 | | 6/x=8/2 | | 8/x=4/8 | | -3x+6-x=22 | | -94=-2x-5x-10 | | 15=3x+3 | | 5x+4+5x=104 | | 7x+2=3x+20 | | x^2+5=14 | | -x-8=8X+10 |