Question

Untitled Question *

1) y = x + 3
y = 8x – 4
A) (1,4)
C) (1,2)
B) (-1,-4)
D) Infinite number of solutions

Answer 1

A

Explanation:

Given the 2 equations

y = x + 3 → (1)

y = 8x - 4 → (2)

Substitute y = 8x - 4 into (1)

8x - 4 = x + 3 ( subtract x from both sides )

7x - 4 = 3 ( add 4 to both sides )

7x = 7 ( divide both sides by 7 )

x = 1

Substitute x = 1 into either of the 2 equations for corresponding value of y

Substituting into (1)

y = 1 + 3 = 4

solution is (1, 4 ) → A