The linear combination method is applied to a system of equations as shown. 4 (.25x. 5y = 3.75) → x 2y = 15 (4x - 8y = 12) → x - 2y = 3 2x = 18what is the solution of the system of equations? (1,2) (3,9) (5,5) (9,3)

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Mathematics

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24 May, 01:40

The linear combination method is applied to a system of equations as shown. 4 (.25x. 5y = 3.75) → x 2y = 15 (4x - 8y = 12) → x - 2y = 3 2x = 18what is the solution of the system of equations? (1,2) (3,9) (5,5) (9,3)

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Gilbert Yang · Answer 1

If we use the last equation:

2 x = 18

x = 18 : 2

x = 9

Then we will put it in another equation:

x - 2 y = 3

9 - 2 y = 3

- 2 y = 3 - 9

- 2 y = - 6

y = - 9 : (-3)

y = 3.

The solution is : D) (9, 3)