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33 votes
33 votes
The following angles are supplementary to each other.

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

User Casper Nybroe
by
2.6k points

2 Answers

20 votes
20 votes

Answer: 20

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

User Martin Samson
by
3.2k points
16 votes
16 votes
3x+21+6x-21=180
9x=180
x=20

So the answer is B (20)
User Boris Treukhov
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2.7k points