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____ [38]
3 years ago
15

Please help...

Mathematics
1 answer:
Liula [17]3 years ago
6 0

If ABCD ≅ QRST, then m∠A = m∠Q. Therefore we have the equation:

x - 10 = 2x - 30       |+10

x = 2x - 20     |-2x

-x = -20      |<em>change the signs</em>

x = 20

<h3>Answer: B. 20</h3>
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