-730
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It's complicated.
- 1 - x
Stick in '729' in place of 'x' :
- 1 - 729 and you get -730
It can be simplified to: x-5y
2x. This is because x is also the same as 1x so the equation really is 3x-1x.
There is always a 1 in front of the x but the 1 is invisible so it same as 1x + 1x = 2x x + x = 2x
7 + 1x + 5 = 12 + x
The expression x2 + 1x - 12 can be factored out as (x - 3)(x + 4)