Question

Find three solutions of linear equation 5x+4y=9 in two variables.

Answer 1

Answer:

/ Solve equation [2] for the variable x

[2] x = 2y - 3

// Plug this in for variable x in equation [1]

[1] 5•(2y-3) - 4y = 9

[1] 6y = 24

// Solve equation [1] for the variable y

[1] 6y = 24

[1] y = 4

// By now we know this much :

x = 2y-3

y = 4

// Use the y value to solve for x

x = 2(4)-3 = 5

Solution :

{x,y} = {5,4}

Answer 2

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The three solutions of linear equation 5x+4y=9 in two variables are

• x = 1 , y = 1

• x = 5 , y = - 4

• x = 9 , y = - 9

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