10. Unlike the Mediterranean Sea and the Red Sea, the Sea of Galilee was?
A. a source of fresh water.
B. too stormy for boats.
C. often used by traders.
D. surrounded by deserts.

yes.

explanation:

because it let the japanese know who had the upper hand in the war.

we need the chart or check box

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