If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( x )
500-(50*x) = 0
500-(50*x) = 0
500-(50*x) = 0
500-50*x = 0
500-50*x = 0 // - 500
-50*x = -500 // : -50
x = -500/(-50)
x = 10
x in (-oo:10) U (10:+oo)
5 = (100*x)/(500-(50*x)) // - (100*x)/(500-(50*x))
5-((100*x)/(500-(50*x))) = 0
5-100*x*(500-50*x)^-1 = 0
(-100*x)/(500-50*x)+5 = 0
(-100*x)/(500-50*x)+(5*(500-50*x))/(500-50*x) = 0
5*(500-50*x)-100*x = 0
2500-350*x = 0
(2500-350*x)/(500-50*x) = 0
(2500-350*x)/(500-50*x) = 0 // * 500-50*x
2500-350*x = 0
2500-350*x = 0 // - 2500
-350*x = -2500 // : -350
x = -2500/(-350)
x = 50/7
x = 50/7
| 3(m+5)+4m= | | 3(x+1)+2*x+3=2*x+8+2x-1 | | 4u-7=-23 | | x=200+(30-1)*100 | | (3y-6)(7y-6u+1)= | | 2a^2+7a-7=0 | | 9=20+k | | 9x-6(4-x)=51 | | 9(x+-1)=-3(x+-9) | | 3/4k-7=6 | | 7x-3x+2x=16 | | 22=3-k | | 9x-(4-x)=51 | | -9v+29=-7(v-7) | | x^4-18x^2+40=0 | | 7+1=3+2 | | 125p^3-1=0 | | -8u=-32 | | 13x^2-39x^3/7x-21x^2= | | 6(x+8)=-3(x+-43) | | k/19=18/19 | | y=-6(1)+4 | | -1/16x*5=-1 | | y=-6(0)+4 | | (x+3)*(x-4)=120 | | x=200*(30-1)*100 | | v-(-4)=-11 | | y=-6(-1)+4 | | 0.4x-0.25(x-8)=6.5 | | 5x^2-43x+2y=0 | | 7a+17+5a=33 | | 13=x/19 |