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(4x-3)(x+3)-(4x+25)(x-2)=0
We multiply parentheses ..
(+4x^2+12x-3x-9)-(4x+25)(x-2)=0
We get rid of parentheses
4x^2+12x-3x-(4x+25)(x-2)-9=0
We multiply parentheses ..
4x^2-(+4x^2-8x+25x-50)+12x-3x-9=0
We add all the numbers together, and all the variables
4x^2-(+4x^2-8x+25x-50)+9x-9=0
We get rid of parentheses
4x^2-4x^2+8x-25x+9x+50-9=0
We add all the numbers together, and all the variables
-8x+41=0
We move all terms containing x to the left, all other terms to the right
-8x=-41
x=-41/-8
x=5+1/8
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