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Ber [7]
3 years ago
14

Need help with this question

Mathematics
1 answer:
goldfiish [28.3K]3 years ago
4 0

Answer:

x = 12

Step-by-step explanation:

Complementary angles add up to have a sum of 90 degrees. We can create an equation and solve for x.

3x + 6x - 18 = 90

~Simplify

9x - 18 = 90

~Add 18 to both sides

9x = 108

~Divide 9 to both sides

x = 12

Best of Luck!

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