What kinds of things do you think chuck yeager had to learn to accomplish all that he did

Chuck Yeager became the first pilot in his group and he was able to downing five enemy aircraft's in a single day.  

Explanation:

Chuck Yeager was born in 1923, He was a fighter pilot who served during world war II. He downed five enemy aircraft's in a single mission. He flew in 64 combat mission and was credited with 121 kills. He achieved great fame as a pilot. He destroyed a jet during crash which was an important and expensive jet. He retired at his 50th anniversary.

8 - (2a + 7) = a + 40     distribute/multiply - into (2a + 7)

8 - 2a - 7 = a + 40

1 - 2a = a + 40       add 2a on both sides

1 = 3a + 40         subtract 40 on both sides

-39 = 3a       divide 3 on both sides

-13 = a

[proof]

8 - (2a + 7) = a + 40

8 - (2(-13) + 7) = -13 + 40

8 - (-26 + 7) = 27

8 - (-19) = 27

8 + 19 = 27

27 = 27