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Can someone please give me the answer.

Can someone please give me the answer.-example-1
User Neda
by
8.6k points

2 Answers

4 votes

Answer:

x = 9

Explanation:

Vertical angles are congruent, so their measures are equal.

4x + 6 = 7x - 21

Subtract 7x from both sides.

-3x + 6 = -21

Subtract 6 from both sides.

-3x = -27

Divide both sides by -3.

x = 9

User Atif Zia
by
7.8k points
6 votes

Because of the postulate "Vertical angles are equal" we can write the equation:

4x + 6 = 7x - 21

Then solve:

(4x + 6) + 21 = (7x - 21) + 21

(4x + 27) - 4x = (7x) - 4x

27/3 = 3x/3

x = 9


User Bluemagica
by
8.0k points

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