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9s+6s-12s=24... Ignore the 's' for a moment giving the sum 9+6-12=24 - This results in the answer 3 x 'something' = 24. Therefore s=8 !
Factorise to (x-1)(x-24)=0 then either x-1 = 0 or x-24 = 0 so x=1 or x=24
51 - x = 24 Add 'x' to both sides 51 -x + x = 24 + x -x + x = 0 Hence 51 = 24 + x Subtract 24 from both sides 51 - 24 = 24 - 24 + x 24 - 24 = 0 51 - 24 = x x = 27
x^2-5x-24=0 is solved by factoring. (x+3)(x-8)=0 x+3=0 x=-3 x-8=0 x=8
The answer is 0 obviously