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-1)/3+1)*(5*x-21)*((10*x-1)/3+2) = 0
(5*x-21)*((x-1)/3+1)*((10*x-1)/3+2) = 0
(x-1)/3+1 = 0
(x-1)/3+(1*3)/3 = 0
x+1*3-1 = 0
x+2 = 0
(x+2)/3 = 0
(x+2)/3 = 0 // * 3
x+2 = 0
(10*x-1)/3+2 = 0
(10*x-1)/3+(2*3)/3 = 0
10*x+2*3-1 = 0
10*x+5 = 0
(10*x+5)/3 = 0
(10*x+5)/3 = 0 // * 3
10*x+5 = 0
(5*x-21)*(x+2)*(10*x+5) = 0
( 10*x+5 )
10*x+5 = 0 // - 5
10*x = -5 // : 10
x = -5/10
x = -1/2
( 5*x-21 )
5*x-21 = 0 // + 21
5*x = 21 // : 5
x = 21/5
( x+2 )
x+2 = 0 // - 2
x = -2
x in { -1/2, 21/5, -2 }
| 18=-4x+b | | -30=t+50 | | 15+.75p=13+.50p | | -4x+b=18 | | -8x-(3x+6)=9-x | | 28-2.2y=11.6+262.6 | | 2x-12=-54-9x | | 92-8x-2x=22 | | -8x-(3+6)=9-x | | 4b-6-8b-7= | | 11-7x=62-28x | | 2-5r=m | | 4-4m-3m=18 | | m^3n^3-125= | | (-3d+2)=88 | | x+2=x^2+3x+1 | | f(x)=12x^2-12x | | 6x+9y=120 | | 16(3/8) | | 3x+6=-5/3 | | 4n+4n=-16 | | -4x-10=-6 | | 4-x/5=-3 | | 1/4(y+20)=12 | | 4x*x+5= | | 2-7b=p | | cos(x)+cos(7x)-cos(4x)-cos(4x)=0 | | 2.5-x+1.5=1.5 | | x/4-10=x/4 | | 4x-4x-2=5 | | mx-nx+c=7 | | 27-2x=21x |