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)
7*((9*x)/8)*x*x = 52 // - 52
7*((9*x)/8)*x*x-52 = 0
63/8*x^3 = 52 // : 63/8
x^3 = 416/63
x^3 = 416/63 // ^ 1/3
x = (416/63)^(1/3)
x = (416/63)^(1/3)
| 4(a+2)=14-2(3-4a) | | 5z=45-4z | | 1/2a+3/5=-7/10 | | (5x+3)=26 | | 2m+60=9m-3 | | 3=-6x+2X+3 | | 4cx-7=5 | | 145*11/29*13/25 | | 2/3=c/20 | | -(1+7p)=29-p | | 14+2a=4a-16 | | 20/2=c/3 | | 4/115/811/12 | | 36=v/5-(-28) | | (5/6-1/2)/1/5 | | 7(1-5m)=37-5m | | 2-(3x+5)=-8 | | 3(6-6x)=108 | | 5x+26(x-2)=277 | | ax=bx-a | | j/8+77=84 | | 4/30=h/90 | | 7x+7y=14 | | 6y-8=2y+5 | | 8g-(-6)=94 | | 39b+70=30 | | 6x^2-8x+6=40 | | 7/4y=28 | | -2x+8=-2(x-4) | | -3(-7+x)=36 | | x/5+4=x/6+5 | | X+3y=4.2 |