Question

Also need help with this one

Answer 1

We have: (9x+3) + (5x-2) + (11x-21) = 180
=> 9x + 5x + 11x = 180 + 21 + 2 - 3
=> 25x = 200
=> x = 8

Ok done. Thank to me:>

Answer 2

x=8°

Explanation:

Let's make an equation with this problem, since all side have to add up to 180 degrees we can solve it

(5x-2)+(9x+3)+(11x-21)=180°

lets add up light terms

25x-20=180°

add both sides by 20 and we get 25x=200°

divide both sides by 25 and we get x=8°