171, 32, 79, 37, 41, 63, 13
median:
mode:
range:

Median:  41

Mode:  All values appeared once

Range:  158

Explanation:

the civil war was a fulfillment and completion of the constitution, not a revolution against it. changes in culture and society surely affected political life. lincoln hoped to bring the north and south together after the war by healing the nationand making people lose their resentment.

hope this you out just took thus test a min go and mad a 100

simplify brackets

8 - 2a - 7 = a + 40

simplify 8 - 2a - 7 to -2a + 1

-2a + 1 = a + 40

add 2a to both sides

1 = a + 40 + 2a

simplify a + 40 + 2a to 3a + 40

1 = 3a + 40

subtract 40 from both sides

1 - 40 = 3a

simplify 1 - 40 o -39

-39 = 3a

divide both sides by 3

-39/3 = a

simplify 39/3 to 13

-13 = a

switch sides

a = -13