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^2 = 16 // - 16
(2/3)*x^2-16 = 0
2/3*x^2 = 16 // : 2/3
x^2 = 24
x^2 = 24 // ^ 1/2
abs(x) = 2*6^(1/2)
x = 2*6^(1/2) or x = -(2*6^(1/2))
x in { 2*6^(1/2), -(2*6^(1/2)) }
| -(5-7n)=30 | | 1/9=a+4/5 | | -16t^2+77t+5=0 | | 1/4=-1/4+x | | 7x+4+3x=34 | | 1000W=125 | | -5n-4(-7n-4n)=36+7n | | 300J=432 | | 13B=624 | | 15y=3000 | | 2x^2-6=104 | | 3n=648 | | (6x^2-5x+9)/(2x-1) | | 75R=325 | | 3(3y+6)-2(y-8)= | | 5+d=-16 | | 2.8X=28 | | 30Y=70 | | x+7^(1/2)+x^(1/2)=2 | | x-4=36 | | 16n=96 | | 8x+0y=-16 | | 64n^3-27= | | 4(2x-8)+1=4-4(x-1) | | 3(x-2)+7=5-2x+6 | | 2(4y+9)-28= | | 2a-10=6 | | -15x4y7/25x6y | | M=6-7 | | -7=8+y | | -4y-4=-3-6y | | 800y=96000 |