Question

Use the substitution method to solve the system of equations.

4x – y = 4
x + 4y = 18
Answer

(4, 1)

(4, 2)

(1, 4)

(2, 4)

Answer 1

use

x = 18-4y

then subs the value into first equation and u get; 4(18-4y)-y=4
then y = 4

subs y =4 into any of the two equation above and u will get x = 2.

then the answer is (2,4).