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)
(2/3)*x^12 = 15 // - 15
(2/3)*x^12-15 = 0
2/3*x^12 = 15 // : 2/3
x^12 = 45/2
x^12 = 45/2 // ^ 1/12
abs(x) = (45/2)^(1/12)
x = (45/2)^(1/12) or x = -(45/2)^(1/12)
x in { (45/2)^(1/12), -(45/2)^(1/12) }
| 6y^5+2y^4-20y^3=0 | | 3x-7=8+23 | | 7(4x+1)=-7x-28 | | 12x/9x | | 5x/3=49/30 | | 9t-5=t+43 | | 6+2(a+3)=10+2(2a+12) | | -3x-6x=12 | | 10cos(x+5)=-5 | | 300=10x | | 1/4=-1/3 | | -2x-14=-8(x+7) | | V-9.10+6=11 | | x^9+x^8+5x^6+9x^4+x-17=0 | | -2x-4=-8(x+7) | | 5.7m-2-6.7m=-13 | | 6y-12-2y-2=10 | | 1.8d-4+3.8d-4=5 | | -n-10n=11n | | 5x-7y=-31 | | 7x+5+4+9= | | 12x+6=x^2+x | | 86+x+x=180 | | 10x+5=x^2+x | | 27f-5-38f-18= | | 93=5-2(5r-4) | | -7(8-12n)=-6(n-6)-2 | | 6+13m-3=9m+14-7m | | 80=5y+5 | | 825x-825x*0.07=10000000 | | -4r-11=4t+21 | | 825x+825x*0.07=10000000 |