Question

solve the following pairs of linear equation by the substitution method 3 x minus y equals to 3 9 x minus 3 y = 2 9​

Answer 1

Answer. 3x - y = 39 (equation 1)

x - 3y = 29 (equation 2)

x - 3y = 29 (From eq. 1)

x = 29 + 3y (equation 3)

3x - y = 39 (From eq. 2)

3 × (29 + 3y) - y = 29 (by eq. 3)

87 + 9y - y = 29

8y = 29 - 87

8y = -58

y = -58/8

y = -29/4

x = 29 + 3y

x = 29 + 3 × (-29/4)

x = 29 - 87/4

x = (-116 - 87)/4

x = -203/4

Answer 2

Answer:

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Step-by-step explanation:

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