Question

Find the degree measure of each angle in the triangle.

Answer 1

A triangle has angles that total 180, so set up an equation, adding all sides and setting it equal to 180 like so:
\[\large (x)+(4x-9)+(7x-3)=180\]
Combine like terms
\[\large \color{red}{(x)}+(\color{red}{4x}-9)+(\color{red}{7x}-3)=180\]
\[\large12x-12=180\]
Now add 12 to both sides to cancel it from the left

\[\large 12x-12\color{gold}{+12}=180\color{gold}{+12}\]

\[\large 12x=192\]
Now just divide both sides by 12 and get your answer

\[\Large x=\frac{192}{12}=?\]