5/9=x/27 135=9x
15=x
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X/27 = 4 Multiply both sides by 27: X = 4*27 = 108
9 x 27 equals 243
4a - 9 = 27 4a = 36 a = 9
Improved Answer:-If: 20x+27 = 143Then: x = 5.8
Well if you mean you have to solve w^3+27 then I guess make it = 0 then solve it w^3+27=0 -27 w^3=27 3rd root w=-3 ~¤~Amy~¤~