Question

the angles of heptagon are (x+3)°, (2x+5)°, ( x+8)°, (3x+1)°, (5x-6)°, (2x+9)°, and (x-5)°. calculate X.

Answer 1

sum of the interior angles of any polygon with n sides =
$= (n - 2) \times 180$
so, a heptagon has 7 sides so sum of interior angles becomes 900°.

so,
x+3+2x+5+x+8+3x+1+5x-6+2x+9+x-5=900
=> 15x+15=900
=>15x=875
=>x=59

Answer 2

(x+3)+(2x+5)+(x+8)+(3x+1)+(5x-6)+(2x+9)+(x-5)=900
= 15x+15=900
= x=900-15÷15
= x=885÷15
= x=59
hope this helps u