Which of these best describes the purpose of the rural free delivery act of 1893? a) to provide food delivery to people at no extra cost b) to provide free mail service to isolated areas of the country c) to provide free medical care to mothers living in rural areas of the united states d) to provide newspaper and radio service to people in rural areas at no direct cost to them

Your answer is B) to provide free mail service to isolated areas of the country. This was kind of obvious if you connect "Free Delivery" with "Free Mail Service."

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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