To eliminate a variable when adding the two equations together, Tatum needs to multiply the second equation by a certain integer so that the coefficients of one of the variables in the two equations will be the same.
Looking at the coefficients of y in the two equations, Tatum should multiply the second equation by 3 in order to have the same coefficient for y in both equations. This will allow for the variable y to be eliminated when the equations are added together.
Therefore, the correct answer is B. 3.
Tatum wants to solve the following system of equations by using the elimination method. What integer should she multiply the second equation by to eliminate a variable when you add the equations?
6x + 3y = 14
3x + 2y = 10
A. -2
B. 2
C. -1/2
D. 6
1 answer
1 answer