Question

need help. i think did something wrong.
i need to convert this to an equation.
"Each interior angle of a regular polygon is 90 less than 5 times the measure of each exterior angle. How many sides does the polygon have?"

so this is how i got it
5(360/x) - 90 = (x-2)180/x
5(360) - 90x = 180x - 360
1800 - 90x = 180x - 360
1800 + 360 = 180x + 90x
2160 = 1890x
1.14 = x

i find it wrong cuz i need to find the number of sides. pls. i need to knw asap :(

Answer 1

how did you get that first equation?