If it's not what You are looking for type in the equation solver your own equation and let us solve it.
x in (-oo:+oo)
x/500 = 42/75 // - 42/75
x/500-(42/75) = 0
x/500-14/25 = 0
1/500*x-14/25 = 0 // + 14/25
1/500*x = 14/25 // : 1/500
x = 14/25/1/500
x = 280
x = 280
| 14/15=75x | | 10(14x+36)=480+100x | | 4x^2+70x+300=114 | | 45x+15=1185 | | (-8x+1)-(3x+4)= | | x+10.5=37.5 | | 3/9=3x | | 32.4/5.4 | | 3j-17=7 | | 12x=24/36 | | (-6v^2-v+6)+(3v^2-2v+4)+(-7v^2+3v+8)= | | W-11=7.4 | | 5x=18/30 | | s^2-18s=49 | | (-2x+7)-(-4x+9)= | | Xx^3-5x^2-x+5=0 | | 4x+3x-18=31 | | 80+x+69+x+49=180 | | 0.50x+0.30(30)=0.25(70) | | 6t+81=15 | | 64=8(u+1) | | 71+x+61+55=180 | | 33+6x=3(11+x) | | Y=2*8x | | 4x+12(10+x)=168+4x | | 3k^2+48k=-123 | | 8/12=2/b | | x+22.50=38.95 | | 4x^2+70x=114 | | 200=8.5/(r-.06) | | -12/0 | | X+y=1.5 |