Question

find the value of x.
(5x + 20)°
50°
e
h
g
x =

Explanation:

Step1: Use angle - sum property

The sum of angles on a straight - line is 180°. So, $(5x + 20)+50 = 180$.

Step2: Simplify the left - hand side

$5x+20 + 50=5x + 70$. The equation becomes $5x+70 = 180$.

Step3: Isolate the variable term

Subtract 70 from both sides: $5x=180 - 70$, so $5x = 110$.

Step4: Solve for x

Divide both sides by 5: $x=\frac{110}{5}$.

Answer:

22