Answer:
The value of x = 23
Step-by-step explanation:
Points to remember
The ratio of of corresponding sides of similar triangles are equal.
To find the value of x
From the figure we can see two similar triangles.
Therefore we can write,
(x - 10)/39 = 5/15
x - 10 = (5 * 39)/15
x - 10 = 13
x = 13 + 10 = 23
Therefore the value of x = 23
