If it's not what You are looking for type in the equation solver your own equation and let us solve it.
0.8x=0.4x+100
We move all terms to the left:
0.8x-(0.4x+100)=0
We get rid of parentheses
0.8x-0.4x-100=0
We add all the numbers together, and all the variables
0.4x-100=0
We move all terms containing x to the left, all other terms to the right
0.4x=100
x=100/0.4
x=250
| 7+6x+4x=-103 | | 2x+10=4x+25 | | 70/3.14=r^2 | | 0.59t-63=1.29t | | 6x+2=7x+1 | | 17+x=1/2 | | x/320=9/15 | | 5(2+x)=30 | | 255/30=x | | 145n;n=17 | | 30*x=255 | | 18.95x+7=177.55 | | 30/x=255 | | -2x-3(x+6)=-4(x-1) | | 4n+8;=5 | | 39*x=156 | | 4n*8;=5 | | 6n+4=5n-11 | | 161-x=70 | | x+(x-68)=-36 | | 8n-2(n+5)=-3n+6n | | 0.0145x=350 | | X^2+12x=245 | | 5a-40=3a+60 | | 12x+9=189 | | x^2-3x+5/4=0 | | 5-3(x-7=32 | | 5x-18=9x-25 | | x=1/2x(130-80) | | 18=r-14 | | 0.25x+0.15(100+x)=17 | | 14.75x=9.50+105x |