If it's not what You are looking for type in the equation solver your own equation and let us solve it.
D( x )
2*x+1 = 0
x-4 = 0
2*x+1 = 0
2*x+1 = 0
2*x+1 = 0 // - 1
2*x = -1 // : 2
x = -1/2
x-4 = 0
x-4 = 0
x-4 = 0 // + 4
x = 4
x in (-oo:-1/2) U (-1/2:4) U (4:+oo)
14/(2*x+1) = 56/(x-4) // - 56/(x-4)
14/(2*x+1)-(56/(x-4)) = 0
14/(2*x+1)-56*(x-4)^-1 = 0
14/(2*x+1)-56/(x-4) = 0
(14*(x-4))/((2*x+1)*(x-4))+(-56*(2*x+1))/((2*x+1)*(x-4)) = 0
14*(x-4)-56*(2*x+1) = 0
-98*x-112 = 0
(-98*x-112)/((2*x+1)*(x-4)) = 0
(-98*x-112)/((2*x+1)*(x-4)) = 0 // * (2*x+1)*(x-4)
-98*x-112 = 0
-98*x-112 = 0 // + 112
-98*x = 112 // : -98
x = 112/(-98)
x = -8/7
x = -8/7
| -16g-20g+(-7g)-(-2g)=19 | | 7t-t-8=5t-6 | | 8x+19+21x-13=180 | | 8m+3=-5 | | 10x+1+4x+11=180 | | 7x+25+17x-13=180 | | 4+(x)+5=7 | | k/5-10=-3 | | a+6+5+11=4a+1 | | (5y+20)-(6y-2)=26 | | (75+50)x=(25+70)x | | 7x+25=17x-13 | | 6x-11=9x-53 | | 75x-50=25x-70 | | a+9=-30 | | 3x+4(5x-16)=97 | | -4u+u-8u-(-2u)=(-9) | | 3x+4(5z-16)=97 | | 4x+15=10x-33 | | (2/c-2)=2-(4/c) | | slope-3-x=3y | | 25/12= | | 3-6x+8x=6 | | 12/x+5=6/2x+8 | | 0.10(x+5)=2.4 | | 0.10(x+5)=2 | | 10x-5=-13 | | -116-12x=8 | | 2cos^3x+cos^2x-2cosx-1=0 | | 10c^2-10c^3= | | 7/4a=-14 | | 3x-9=57 |