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)
0 = ((3*x)/7)*x+23 // - ((3*x)/7)*x+23
0-(((3*x)/7)*x)-23 = 0
(-3/7)*x^2-23 = 0
-3/7*x^2 = 23 // : -3/7
x^2 = -161/3
x belongs to the empty set
| 5x-4x-9=-9 | | 5x-4x-9=9 | | x+(x+1)=42 | | 20/30=100 | | 20/300=100 | | 4x-3=8x+1 | | 20/30+100 | | 2u=-34 | | 4n-3h/3=c | | 1+2x-3= | | Y/4-55=X | | 1600+X=Y | | 2v+3+2v-1= | | 8x-7/3=7 | | 5m+1=15 | | 22=7w-1/(2)+5w+5/(6) | | 7y-161/3 | | 7/4x+7-x/3=4-7x+5 | | 7/x=38/53 | | y=(5*1+23)/7 | | 3m-1+4m-2= | | 7x-3(x-2)=15 | | 21-3x=-3(1+3x) | | 1.5y=15 | | 3/5(2x+6)=2(4-2x)+6 | | (3a+1)-(4a-1)=0 | | 12=n-19 | | y=(5(1)+23)/7 | | y=(5x+23)/7 | | 4[x-3]-2[2-2x]=4-7x+5 | | 3x-17-2x=-1 | | 3x-17-2x=1 |