solve the linear equation,

Question

y=4x and y+x=5 tell how you got the answer.
A.)(-4,1)
B.)(1,4)
C.)(-3,2)
D.)(2,3)

Answer 1

y = 4x
y + x = 5
Use substitution
4x + x = 5
5x = 5
x = 1
Substitute again
y + x = 5
y + 1 = 5
y = 4
The answer is B: (1,4)