If m∠3 = 4x – 31 and m∠8 = 2x + 7, what is the value of x?
a.24
b.34
c.44
d.54
Answers
c.44 is the answer hope it is correct
Given:
If m∠3 = 4x – 31 and m∠8 = 2x + 7,
To find:
What is the value of x?
Solution:
From the figure, we have
- Line a and line b are two parallel lines
- line t is a transversal line that cut both the parallel lines a and b
∴ m∠6 = m∠8 . . . . [vertically opposite angles] . . . . Equation 1
Also,
m∠3 + m∠6 = 180° . . . . . [conseutive interior angles are supplementary]
onsubstituting from equation 1, we get
⇒ m∠3 + m∠8 = 180°
⇒ (4x -31)° + (2x + 7)° = 180°
⇒ (6x - 31 + 7)° = 180°
⇒ (6x - 24)° = 180°
⇒ 6x° = 180° + 24°
⇒ 6x° = 204°
⇒ x =
⇒ x = 34°
Thus, the value of x is → 34°.
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