2y+4x=8 when x=-2,1,3

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Mathematics

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12 May, 19:45

2y+4x=8 when x=-2,1,3

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Devon Dickerson · Answer 1

4x + 2y = 8

When x = - 2: 4x + 2y = 8

4 (-2) + 2y = 8

-8 + 2y = 8

+ 8 + 8

2y = 16

2 2

y = 8

(x, y) = (-2, 8)

When x = 1: 4x + 2y = 8

4 (1) + 2y = 8

4 + 2y = 8

- 4 - 4

2y = 4

2 2

y = 2

(x, y) = (1, 2)

When x = 3: 4x + 2y = 8

4 (3) + 2y = 8

12 + 2y = 8

- 12 - 12

2y = - 4

2 2

y = - 2

(x, y) = (3, - 2)