Question

What is the value of y? HELP me

Answer 1

y = 51°

Explanation:

180° = y + 16° + y - 20° + (180° - y - 47°)

combine like terms:

180° = y + 129°

y = 51°

Answer 2

y=51

Explanation:

We know that the two outer angles of a triangle are equivalent to the outer angle if both the angle and the triangle are on a straight line.

So,

If we add like terms on the left side, we get

Now, let’s add 4 to each side. If we do, we get

Finally, we subtract y from each side to find y. Thus,