A student is trying to solve the system of two equations given below:
Equation P: x + y = 8
Equation Q: 2x + 5y = 24
Which of the following steps can be used to eliminate the x term?
A. 2(x + y = 8)
B. -2(x + y = 8)
C. -1(2x + 5y = 24)
D. -2(2x + 5y =24)

ANSWERS

2021-04-08 04:53:58

A. 2(x + y = 8) Once you do that with Equation P, you can do the following: 2x + 2y = 16 (2x + 2y) - (2x + 5y) = 16 - 24 ( modified Equation P minus Equation Q ) 2x - 2x + 2y - 5y = 16 - 24 -3y = -8 Magic. x has been eliminated.

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