Question

Help! please i’ll give free thanks and mark brianlist! :(

Answer 1

4

Explanation:

The triangles are similar. So:

=

=

Cross multiply the equation

5(10-x) = 3 x 10

50 - 5x = 30

Move -5x to the right to make it positive and in turn move 30 to the left.

50 - 30 = 5x

5x = 20

x =
`(20)/(5)`

x = 4