When Pete had a fever, his temperature was

101.4°F. After taking some medicine, his

temperature was 99.2°F. The equation

101.4-d=99.2 gives the number of degrees

d that Pete's temperature decreased. What is

the solution of the equation?

Answer:Simplifying

101.4 + - 1d = 99.2

Solving

101.4 + - 1d = 99.2

Solving for variable 'd'.

Move all terms containing d to the left, all other terms to the right.

Add '-101.4' to each side of the equation.

101.4 + - 101.4 + - 1d = 99.2 + - 101.4

Combine like terms: 101.4 + - 101.4 = 0.0

0.0 + - 1d = 99.2 + - 101.4

-1d = 99.2 + - 101.4

Combine like terms: 99.2 + - 101.4 = - 2.2

-1d = - 2.2

Divide each side by '-1'.

d = 2.2

Simplifying

d = 2.2

2.2 degrees F

Explanation:

101.4 - 99.2 = 2.2