Question

Hi! quick question, whats the equation for this?

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

Answer 1

x=25

Explanation:

4x+5x-8+96+5x+2+4x=540

18x+90=540

18x=540-90=450

x=450/18=25

Answer 2

`\\ \sf\longmapsto 4x+4x+5x-7+5x+2+96=540`

`\\ \sf\longmapsto 4x+4x+5x+5x-7+2+96=540`

`\\ \sf\longmapsto 8x+10x-5+96=540`

`\\ \sf\longmapsto 18x+91=540`

`\\ \sf\longmapsto 18x=540-91=449`

`\\ \sf\longmapsto x=(449)/(18)`

`\\ \sf\longmapsto x\approx2.4`