Question

The following angles are supplementary to each other.

mzA= (3x + 21)° and mzB = (6x - 21)°
Determine x.
A10
B20
C36
D60

Answer 1

Answer: 20

Step-by-step explanation: I can help with am explanation if you dm me:)

Answer 2

3x+21+6x-21=180
9x=180
x=20

So the answer is B (20)