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)
250-(2*x) = (40*x)/80 // - (40*x)/80
250-(2*x)-((40*x)/80) = 0
(-1/2)*x-2*x+250 = 0
250-5/2*x = 0 // - 250
-5/2*x = -250 // : -5/2
x = -250/(-5/2)
x = 100
x = 100
| X^3+9x^2+21x+13=0 | | 3x+y+2x-y= | | 144177=X+(X(0.05)) | | y=v^5*v*v^3*v^3 | | 267=5[8n+4]+7 | | 2x-x/2=0 | | 7y-31=-2(y+2) | | -2/5v-2/3=-1/4 | | (x+3)(x-4)=x+23 | | 4n+0.24=15.74 | | 3x-4(x+5)=3x+8 | | -8x+6(x+2)=4 | | 6x+1+3x-2= | | X^-3x/x^8 | | x-12=(1/5)x | | p=pl+2w | | -2/3y-3/5=1/2 | | -3/2-3/7x=-7/3 | | h+20=-4h | | 4x+6x+16=66 | | 3(y+2)-5y=26 | | 8m-12=16 | | 93+12m=3[4m-1]+96 | | 4(1-3x)-14=4(2x+3)-9x | | -6/7=-1/2w-5/3 | | y=-(6u-2x-6) | | 6(x-4)=-3x+21 | | 7(x-1)=9x-1 | | 15=29+7 | | 4[-4-8m]+28m+4m=-272 | | -5/2=1/7u-8/3 | | (7x-4)(5x+2)=38 |