Question

interior and exterior triangle angles
question
in $\delta hij, \text{m}\angle h = (x - 12)\degree,$
$\text{m}\angle i = (x - 5)\degree,$ and
$\text{m}\angle j = (9x - 1)\degree.$ what is the value of $x$?
answer
attempt 1 out of 2
$x = \square$ submit answer

Explanation:

Step1: Sum angles to 180°

$(x-12)+(x-5)+(9x-1) = 180$

Step2: Combine like terms

$11x - 18 = 180$

Step3: Isolate variable term

$11x = 180 + 18$
$11x = 198$

Step4: Solve for x

$x = \frac{198}{11}$

Answer:

$x = 18$