Question

Solve for x please and explain!

Answer 1

9514 1404 393

Answer:

x = 6

Explanation:

The parallel lines divide the side lengths proportionally.

21/14 = (x+3)/x

1.5 = 1 +3/x . . . . perform the division

0.5 = 3/x . . . . . .subtract 1

x = 6 . . . . . . . . . multiply by 2x