Solve the system of linear equations by elimination. x+4y=6 −x−2y=−4 September 5, 2021 by Thiên Thanh Solve the system of linear equations by elimination. x+4y=6 −x−2y=−4
Answer: (x , y) = (2 , 1) Step-by-step explanation: // Solve equation [1] for the variable x [1] x = -4y + 6 // Plug this in for variable x in equation [2] [2] -(-4y+6) – 2y = -4 [2] 2y = 2 // Solve equation [2] for the variable y [2] 2y = 2 [2] y = 1 // By now we know this much : x = -4y+6 y = 1 // Use the y value to solve for x x = -4(1)+6 = 2 Reply
Answer:
(x , y) = (2 , 1)
Step-by-step explanation:
// Solve equation [1] for the variable x
[1] x = -4y + 6
// Plug this in for variable x in equation [2]
[2] -(-4y+6) – 2y = -4
[2] 2y = 2
// Solve equation [2] for the variable y
[2] 2y = 2
[2] y = 1
// By now we know this much :
x = -4y+6
y = 1
// Use the y value to solve for x
x = -4(1)+6 = 2