Answer:
The nation's total wealth more than doubled between 1920 and 1929, and this economic growth swept many Americans into an affluent but unfamiliar “consumer society.” People from coast to coast bought the same goods (thanks to nationwide advertising and the spread of chain stores), listened to the same music
The answer is B. x = 29
Here's how I solved for x.
Step 1: Simplify 
to 
. Which leaves us with 
Step 2: Add 21 to both sides. Which leaves us with 
Step 3: Add 
to get your answer: x = 29
Make a triangle with a 90° angle
and another two angles at 45°angles
that's how you make a special right triangles
The answer for your problem would be y-12
