Which contribution did the Mesopotamians make to the evolution of writing? A They created cave paintings, which led to the development of a system of symbols that represented words.
B
They developed a system of hieroglyphics, which used pictures to represent objects, ideas, and sounds.
a
С
They developed a system of script known as cuneiform, which involved making marks on clay tablets
They created the Phoenician alphabet, which used pictures to represent individual sounds

Cuneiform

Cuneiform is a system of writing first developed by the ancient Sumerians of Mesopotamia c. 3500-3000 BCE. It is considered the most significant among the many cultural contributions of the Sumerians and the greatest among those of the Sumerian city of Uruk which advanced the writing of cuneiform c. 3200 BCE.

Explanation:

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