x = 256.5
(-2x + 513 = 0)
(x - 256.5 = 0) Divide both sides by -2
(x = 256.5) Multiply by negative
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-2x+5=13 you subtract 5 away from +5 and this cancels out. you then do the same to the other side by taking 5 away from 13 therefor you get 8. Now you have -2x=8, take -2x and divide it into 8 and you get 4.
2x + 5 = 31 2x = 31 - 5 = 26 x = 13
4
= 18x + 13
4x3+10x2+2x+5= (2x+5)(2x2+1)