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2 December, 18:48

Explain how to form a linear combination to eliminate the variable y for this system. 2x - 3y = 3

5x + 2y = 17

A) Multiply the first equation by 2 and the second equation by 3.

B) Multiply the first equation by - 5 and the second equation by 2.

C) Multiply the first equation by - 2 and the second equation by 3.

D) Multiply the first equation by 2 and the second equation by - 3.

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Answers (1)
  1. 2 December, 22:33
    0
    Alright, this is an easy one!

    So we are trying to get rid of the y value so the first equation has - 3y. The second equation has 2y. What values would make these equal.

    A.) 2*-3y = - 6y and 3 * 2y = 6y.

    Now take - 6y + 6y and that gives you 0.

    Thus, the answer is A.) Multiply the first equation by 2 and the second equation by 3.
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