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2 years ago

3x + ky = 8

Mathematics

1 answer:

djyliett [7]2 years ago

3 0

Answer:

a) 3x + ky = 8

ky = 8 - 3x

x – 2ky = 5

x - 2(8 - 3x) = 5

x - 16 + 6x = 5

7x = 21

x = 3 (shown)

b) x-2ky = 5

sub x = 3, y = 1/2

3-2k(1/2) = 5

-2k = 2

k = -1

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Step-by-step explanation:

Given,

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Let,

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According to given statement;

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Multiplying Eqn 1 by 1.50

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Dividing both sides by 1.75

$\frac{1.75y}{1.75}=\frac{215.25}{1.75}\\y=123$

Putting y=123 in Eqn 1

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Keywords: linear equation, elimination

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