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Alinara [238K]
3 years ago
14

If shown, line AB and line CD are straight lines. Find x in each case.

Mathematics
1 answer:
Sauron [17]3 years ago
5 0

Answer:

x = 45

Step-by-step explanation:

To find x, derive an equation from the figure given.

Angles on a straightline = 180°. Therefore:

15 + x + 2x + 120 - 2x = 180

Combine like terms

15 + 120 + x + 2x - 2x = 180

135 + x = 180

Subtract 135 from both sides

135 + x - 135 = 180 - 135

x = 45

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