Answer:
[tex]x=31\°[/tex]
Step-by-step explanation:
we know that
The sum of the interior angles in a triangle must be equal to 180 degrees
so
In this problem
[tex]x\°+3x\°+56\°=180\°[/tex]
solve for x
[tex]4x=180-56[/tex]
[tex]4x=124[/tex]
[tex]x=31\°[/tex]
