If it's not what You are looking for type in the equation solver your own equation and let us solve it.
1xx2x=300
We move all terms to the left:
1xx2x-(300)=0
We move all terms containing x to the left, all other terms to the right
1xx2x=300
x=300/1
x=300
| 5(3y-)=35 | | X³+4x²-36x=0 | | X²+4x²-36x=0 | | X=y+100=X+y=420 | | 360=90+3x+x | | 4x+x=4x+9+x+6 | | x^2-25x-2300=0 | | 3(e-4)=9 | | 8(x+40)=1.5(2x+9) | | 0.09-1.8x+8x^2=0 | | -2-5y=13 | | (-t)/16=6 | | 6x=-28/5 | | 6x=28/5 | | 6x=-4/35 | | 42x+1=1/16 | | 2x+4=9x+(-7) | | 1.03^x=2(1000) | | (2x+2x)+(4x+4x)=40 | | 17.5=10×2.5+1/2×a×6.25 | | M^2-m-1=0 | | 24+x/7=31 | | 5m-4=1-8m | | M^3-m^2-m=0 | | 2p=-36 | | 49+x=18 | | 6q+3q-9=24 | | 9n^2-9n-500=0 | | 206t+3=102 | | 75+105+x+x=360 | | 2x+3x+5x+8=360 | | 2x+20+2x=92 |