Question

One cold day, the temperature decreased by 7 times the temperature, resulting in a decrease of 12º. Can someone put this into an equation with x?

A. 7x - x = 12
B. x - 7x = 12
C. 7x + x = 12
D. x + 7x = 12

Answer 1

To represent the given situation in an equation, the correct choice is option B: x - 7x = 12. The original temperature can be found by solving this equation.

Step-by-step explanation:

To put the given situation into an equation, let's assume that the original temperature is represented by x. According to the problem, the temperature decreased by 7 times the temperature, resulting in a decrease of 12º. This can be expressed as:

x - 7x = 12

Simplifying the equation, we get -6x = 12. Solving for x, we divide both sides of the equation by -6, giving x = -2. Therefore, the original temperature was -2º.

The correct equation that represents the situation is option B: x - 7x = 12.