Question

The weather report says that if the temperature drops 10°, it will reach 25° below zero. The current temperature T can be found by solving the equation T – 10 = –25. Which answer describes the correct method for solving the equation?

Answer 1

Add 10 to each side of the equation.

Step-by-step explanation:

Answer 2

The current temperature is -15° (15° below zero)

Step-by-step explanation:

The temperature drops 10°:

T-10°

It will reach 25° below zero:

T - 10° = -25°

We add 10° in both members of the equation:

T - 10° +10° = -25° +10°

The equation is simplified as follows:

T = -25° +10°

T = -15°

The integer -15° can be expressed as 15° below zero.