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Lubov Fominskaja [6]
3 years ago
9

Help me please please

Mathematics
1 answer:
Elina [12.6K]3 years ago
8 0

Answer:   7

<u>Step-by-step explanation:</u>

m∠ABC = 40°.  Since BD is an angle bisector <em>(divides the angle into two congruent angles)</em>, then m∠ABD = 20° and m∠CBD = 20°

ABD = 20   and    ABD = 3x - 1

⇒ 20 = 3x - 1

⇒ 21 = 3x

⇒  7 = x

<u>Check: </u>

CBD = 20   and    CBD = 34 - 2x

⇒ 20 = 34 - 2x

⇒ -14 = -2x

⇒  7 = x    \checkmark  

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