Question

Solve, using the substitution method.
4x + 2y = 11
x – 2 = – 2y

Answer 1

(3, -1/2)
(0, -2)
(0, -11/2)
(7, -5/2)

Answer 2

use second equation.. x = 2 - 2y
putting this in first, we obtain

4(2 - 2y) + 2y = 11
8 - 8y + 2y = 11
8 - 6y = 11
-6y = 3
y = -1/2 ...... (i)

put this y in x = 2 - 2y
u get,

x = 2 - 2 ( -1/2 )
x = 2 + 2 ( 1/2 )
x = 2 + 1
x = 3.

hence answer is ( 3, -1/2 )

Answer 3

thanks!