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)*(x-3) = (7*x)/4 // - (7*x)/4
(x+3)*(x-3)-((7*x)/4) = 0
(x+3)*(x-3)+(-7/4)*x = 0
(x+3)*(x-3)+(-7*x)/4 = 0
(4*(x+3)*(x-3))/4+(-7*x)/4 = 0
4*(x+3)*(x-3)-7*x = 0
4*x^2-7*x-36 = 0
4*x^2-7*x-36 = 0
4*x^2-7*x-36 = 0
DELTA = (-7)^2-(-36*4*4)
DELTA = 625
DELTA > 0
x = (625^(1/2)+7)/(2*4) or x = (7-625^(1/2))/(2*4)
x = 4 or x = -9/4
(x+9/4)*(x-4) = 0
((x+9/4)*(x-4))/4 = 0
((x+9/4)*(x-4))/4 = 0 // * 4
(x+9/4)*(x-4) = 0
( x+9/4 )
x+9/4 = 0 // - 9/4
x = -9/4
( x-4 )
x-4 = 0 // + 4
x = 4
x in { -9/4, 4 }
| -3x-2x+1=0 | | x(2x+3)+6x^2=9x-1 | | 0=x^3-12x^2+x-42 | | x^3-12x^2+x-42=0 | | x=7/5 | | x^2-1/5=7 | | 6x-7=-4x+13 | | 7x-[-5(x-y)+(3x-2y)-3(2x-5y)]= | | 4x-2[-x-(7x-y)+5(x-2y)-2(3x-4y)]= | | -3+[5-2(-a+3b)]= | | -a+4[-2-5(a-b)]= | | 11x=-66/7 | | 21/11y=24/11 | | abcdefgxhijklmn=13599273702913 | | 10x=40/21 | | -21/10y=-2/5 | | 2x-10=sqrt(x-2) | | (x^2-4)/(x+2)=0 | | x^5+16ix=0(x) | | (x^2-4)/x+2=0 | | 0=15x/0.77 | | 11y=-104/7 | | 21/11x=18/5 | | 4-4/10 | | 2.5x+1.5y=80 | | .6x=400 | | 221/10x=9/5 | | x^2-0.75x=19 | | -66/7+80/7 | | 11x+10y=2 | | 10x=-60/7 | | 2(w+5)(w-24)=0 |