Answer:
38°
Step-by-step explanation:
The figure given is a triangle.
Sum of angles in triangle = 180°
So;
∠D + ∠E + ∠F = 180°
( 5x - 2) + (9x + 3) + (11x - 21) = 180
5x -2 + 9x + 3 + 11x -21 = 180
25x -20 = 180
25x = 200
x = 8
Now since ∠D = 5x -2;
∠D = 5(8) - 2 = 38°
6t + 4 = -2
6t = -2 - 4
6t = -6
t = -1
:)