Question

The answer choices for the second blank is-120,110,115,100I just need a brief explanation with the answer

Answer 1

From the image, we have:

I) 2x + 12 + y = 180

II) 3x + 23 = y

First, we put all the variables from each equation on the same side:

I) 2x + y = 168

II) 3x - y = -23

Adding equation I to equation II we got:

5x = 145

x = 29

Applying this result on equation I, we got:

2*29 + y = 168

y = 168 - 2*29 = 110