If it's not what You are looking for type in the equation solver your own equation and let us solve it.
X-0.90X=50
We move all terms to the left:
X-0.90X-(50)=0
We add all the numbers together, and all the variables
0.1X-50=0
We move all terms containing X to the left, all other terms to the right
0.1X=50
X=50/0.1
X=500
| -9k=20+k | | -65=7+6k | | 6(2-x)=2x+1 | | 5.4n+4.8=(1.8n+1.6) | | -4.9x^2+9x+700=0 | | 42=31-5c | | 2(3x+2)-7=8x-12(x+3) | | -1/10y=3 | | 7+5x-3x-5+2x=29-5x | | 3/5y=1/10y+200 | | 4/5n=-32/10 | | 9A+12b=28.5 | | 3b2-8b=5b | | -6(x-2)-14(3-6x)=-36 | | 15/4=5n | | x-0.5x+6=10 | | -2x+6=-3+5x | | 4=c×3 | | 4=x•3 | | 2x+4+6x-100=180 | | 5x+(x-3)=3+8(x-1) | | 15x-20=8x | | 4x+3=5+(4x-2) | | 4x+3=5+((4x-2) | | -4.9t^2+9t+700=0 | | -221=10n+9 | | (n-2)540=n | | 2x-6/8=1 | | 3x+2+49=180 | | x^2-13x+20=6 | | (n-2)540=0 | | 8x2-2x-2=1 |