If it's not what You are looking for type in the equation solver your own equation and let us solve it.
(x+6)(x-3)-(x+3)(x+9)=9
We move all terms to the left:
(x+6)(x-3)-(x+3)(x+9)-(9)=0
We multiply parentheses ..
(+x^2-3x+6x-18)-(x+3)(x+9)-9=0
We get rid of parentheses
x^2-3x+6x-(x+3)(x+9)-18-9=0
We multiply parentheses ..
x^2-(+x^2+9x+3x+27)-3x+6x-18-9=0
We add all the numbers together, and all the variables
x^2-(+x^2+9x+3x+27)+3x-27=0
We get rid of parentheses
x^2-x^2-9x-3x+3x-27-27=0
We add all the numbers together, and all the variables
-9x-54=0
We move all terms containing x to the left, all other terms to the right
-9x=54
x=54/-9
x=-6
| x/6-7=4-5 | | 5c+6=2c+3 | | 42=y±15 | | 11x+24+90=180 | | 21+y=19 | | m+11=30 | | 6=g-914/8 | | 12x+78+90=180 | | c-25=34 | | 56-v=24.5 | | 129=b/5+113 | | 8.02=x-5.5 | | m+37=91 | | -2x+146+90=180 | | 188=-80+4n | | x÷6/7=4/5 | | 8a-3=37 | | 30(v-960)=360 | | 5w-2=72 | | 7/2x+3/2=3/25 | | 6x-28=7x | | w/6=178.2 | | 7+x+20=180 | | v/9-16=12 | | m-56=40 | | 7+x+20=360 | | 8x+3(x+4)=-21 | | m+27/5=9 | | 4(y+2)-7(2y-1)=30-9(3y-4) | | -90=-6(u+56) | | 1x+(-12)=-11 | | 8+3b=62 |