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(7x-7)(7x-7)-(2x-1)(2x-1)=(5x-12)(9x+30)
We move all terms to the left:
(7x-7)(7x-7)-(2x-1)(2x-1)-((5x-12)(9x+30))=0
We multiply parentheses ..
(+49x^2-49x-49x+49)-(2x-1)(2x-1)-((5x-12)(9x+30))=0
We calculate terms in parentheses: -((5x-12)(9x+30)), so:We get rid of parentheses
(5x-12)(9x+30)
We multiply parentheses ..
(+45x^2+150x-108x-360)
We get rid of parentheses
45x^2+150x-108x-360
We add all the numbers together, and all the variables
45x^2+42x-360
Back to the equation:
-(45x^2+42x-360)
49x^2-45x^2-49x-49x-(2x-1)(2x-1)-42x+49+360=0
We multiply parentheses ..
49x^2-45x^2-(+4x^2-2x-2x+1)-49x-49x-42x+49+360=0
We add all the numbers together, and all the variables
4x^2-(+4x^2-2x-2x+1)-140x+409=0
We get rid of parentheses
4x^2-4x^2+2x+2x-140x-1+409=0
We add all the numbers together, and all the variables
-136x+408=0
We move all terms containing x to the left, all other terms to the right
-136x=-408
x=-408/-136
x=+3
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