Mathematics
Solve the following simultaneous equations:
x + 2y = 1, 3x - y = 17
Linear Equations
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Answer
Given,
Equations : x + 2y = 1, 3x - y = 17
⇒ x + 2y = 1
⇒ x = 1 - 2y ….(1)
Substituting value of x from equation (1) in 3x - y = 17, we get :
⇒ 3(1 - 2y) - y = 17
⇒ 3 - 6y - y = 17
⇒ -7y = 17 - 3
⇒ -7y = 14
⇒ y = = -2.
Substituting value of y in equation (1), we get :
⇒ x = 1 - 2y
⇒ x = 1 - 2(-2)
⇒ x = 1 + 4
⇒ x = 5.
Hence, x = 5, y = -2.
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