If it's not what You are looking for type in the equation solver your own equation and let us solve it.
3x+8+5x+2=90
We move all terms to the left:
3x+8+5x+2-(90)=0
We add all the numbers together, and all the variables
8x-80=0
We move all terms containing x to the left, all other terms to the right
8x=80
x=80/8
x=10
| 4x+31=6x+9 | | (4x+31)=(6x+9) | | x+7/8=-6 | | 0,2x+0.006x^2=50 | | (k+1/2)²=9/16 | | 3w+44=-7(w-2) | | (1/2)+x=-2 | | x^2+5^2=50 | | 8-0.4y=2.2-2y | | 3=-0.5+c | | )5(2y-1)=(y-4) | | 4p+2/5(10+2p)=8 | | 1/2+x=-2 | | 6c=-96 | | 10x-100+14=12 | | 3/8(4-8x)=2x-2/3(6-12x) | | -3x-2x-8x=-4-3/2 | | 4(10x-2)=193 | | 13x=11/2 | | 13x=51/2 | | x^2+4x+360=0 | | |3x+19|=13 | | .75y+.5=7 | | 3/4y+.5=7 | | 1/x=-0.021 | | 3y/4+1/2=7 | | 1/x=0.004 | | 48/x=30 | | 7h-8=71 | | 5=3h+100h^2((3h+2h^2)/(3+2h√(1+2^2)))^(2/3)×(0,0006)×1/2 | | X=-5y+33/3 | | 10m-3=67 |