Identify the relationship and solve for x

These are alternate exterior angles

they alternate (or cross) the traversal (the center line)

and they are exterior (they are both outside)

and they are equal

100 = x + 105 subtract 105 from both sides

-105       -105

-5 = x

x = -5

answer: 21$

step-by-step explanation:

$42 / $14 = 3   (ratio 3: 1)

$7 x 3 = $21