Solve. --12 + X = X - 12

question 27

Multiple Choice

Solve.
--12 + x = x - 12

• A) 0
• B) All real numbers
• C) No solution
• D) 24

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Definitions:

Dense

Having a high mass per unit volume; closely compacted in substance.

Arête

A sharp, narrow ridge found in rugged mountains, formed by the erosion of two glaciers side by side.

Depression

In geology, a landform sunk below its surroundings, forming a low area which can be natural or man-made.

Valley

A low area between hills or mountains, typically with a river running through it.