Question

A set of equations is given below:

Equation A: e = 4f + 1
Equation B: e = 3f + 5
Which of the following is a step that can be used to find the solution to the set of equations?

A. 4f + 1 = 3f
B. 4f = 3f + 5
C. 4f + 5 = 3f + 5
D. 4f + 1 = 3f + 5

Answer 1

Sorry Im 4 years late but the answer is D: 4f+1=3f+5

Explanation:

I got it right on my test

Answer 2

Filling in one equation into the other will lead to elimination of one variable, enabling you to solve the other. In this case it is very easy to eliminate variable e right away. So you end up equating the terms of A and B:

4f + 1 = e = 3f+ 5

Forget e and you see it is answer D.