With economics
1. name a game you know how to play. list one role that players may have in the game, one official rule, and one property of the game.
2. list a rule, a property, and an outcome in the game of economics.
score
3. how is the game of economics similar to the games you are used to playing? how is it different?

if triangle abc is congruent to triangle def, their interior angles are congruent, because congruent parts of congruent triangles are congruent (cpctc).

that means ∠d is congruent to ∠a; ∠d is equal to 8x - 2.

interior angles of all triangles add to equal 180 degrees, so you can set the sum of these interior angle values equal to 180 and solve for x.

180 = (8x - 2) + 22 + 72

180 = 8x - 2 + 22 + 72

180 = 8x + 92

88 = 8x

11 = x

x = 11