Use two equations in two variables to find the following integers: One integer is twice another. Their sum is 39.
A)13, 26
B)26, 52
C)13, 52
D)16, 23
E)no such integers exist

Question

Quizplus · Accepted Answer

Let the two integers be x and y, with y being twice x (y = 2x). Their sum is 39 (x + y = 39). Substituting y in the second equation gives x + 2x = 39, which simplifies to 3x = 39. Solving for x gives x = 13, and thus y = 26.

Use Two Equations in Two Variables to Find the Following