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True [87]
3 years ago
15

The sum of the angle measures of the polygon is 540. write and solve an equation to find the value of x

Mathematics
1 answer:
Sliva [168]3 years ago
8 0

\\ \sf\longmapsto 85+5x+5x+5x-10+5x+5=540

\\ \sf\longmapsto 5x+5x+5x+5x+85-10+5=540

\\ \sf\longmapsto 20x+80=540

\\ \sf\longmapsto 20x=540-80=460

\\ \sf\longmapsto x=\dfrac{460}{20}

\\ \sf\longmapsto x=23

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