how do you solve b/7.8=-2.15

Question

Complete the following tasks for this equation: = -2.15.

1. Give an estimate for the solution. Be sure to explain how you arrived at the estimate, either by showing an equation or in words.
2. Solve the equation. Show or explain your work.
3. Explain if your answer is reasonable compared to your estimate.

Answer 1

(b)/(7.8)=-2.15

Multiply each term in the equation by 7.8.
(b)/(7.8)*7.8=-2.15*7.8

Cancel the common factor of (1)/(7.8).
1b=-2.15*7.8

Multiply -2.15 by 7.8 to get -16.77.
1b=-16.77

Divide each term in the equation by 1.
(1b)/(1)=-(16.77)/(1)

Cancel the common factor of 1.
b=-(16.77)/(1)

Divide -16.77 by 1 to get -16.77.
b=-16.77