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lisabon 2012 [21]
3 years ago
7

Can someone please give me the answer.

Mathematics
2 answers:
statuscvo [17]3 years ago
8 0

Answer:

<em>x = 9</em>

Step-by-step 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

noname [10]3 years ago
5 0

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

<u>x = 9</u>


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