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/3 = 12-(2*x) // - 12-(2*x)
x/3+2*x-12 = 0
7/3*x-12 = 0 // + 12
7/3*x = 12 // : 7/3
x = 12/7/3
x = 36/7
x = 36/7
| 12x+2y=23 | | -7x+2(7x-4)=34 | | 2x+4=3(3x-5) | | 6v/5=12 | | 6x/3=57 | | 8a^2-14ab+3b^2=0 | | 9=0.25+9 | | a+3+2a=-1+3a+a | | 4x^2=x^4 | | 4(y-x)=6x | | 8f+3-2=31 | | Y=0.25x+9 | | 7(-m-9n)= | | x/3=12=18 | | 4x-3(x-9)=4+2x | | 3z^3+15z^2-4z=0 | | y=4000-3X | | 8x^6/8x^5 | | 3x+5(x-10)+2(x+20)=890 | | (3y+1)(7-y)=0 | | 5/4x-3/4=1/2 | | 7(2x-4)+(5-3x)=2 | | V=4/3pir^3 | | 5w(w+9)(w-7)=0 | | 3.6=(5-x)+(3.6-x)+(2.8-x) | | 2(x+4)+(x-10)=8 | | 1/5x-7=y | | (-14)=2-6 | | (4y-6)(3-y)=0 | | -8k-2=-14-4k | | 2x+2xy+y=14 | | 9a+7=-47 |