Question

The triangles are similar.
What is the value of x?
Enter your answer in the box.

Answer 1

x=4

Explanation:

I took the test

Answer 2

`\boxed{\boxed{x=4}}`

Explanation:

If the triangles are similar, then the sides are in proportion.

We have the equation:

`(3x+8)/(4)=(15)/(3)` cross multiply

`3(3x+8)=(4)(15)` divide both sides by 3

`3x+8=(4)(5)`

`3x+8=20` subtract 8 from both sides

`3x=12` divide both sides by 3

`\boxed{x=4}`