The sum of the measures of the interior angles of the triangle is 180°. Write and solve an equation to find the value of the variable.
3x + 44 + (x + 20) = 180
3x + 44 + x + 20 = 180
4x + 64 = 180 (simplify)
4x = 116 (subtract 64 from both sides)
x = 29 (divide by 4)