Question

Solve

y=5x−8
y=x−20

(-3, -23)
(-3, -23)

no solution
no solution

(-23, -3)
(-23, -3)

all real numbers
all real numbers

Answer 1

(- 3, - 23 )

Explanation:

y = 5x - 8 → (1)

y = x - 20 → (2)

substitute y = 5x - 8 into (2)

5x - 8 = x - 20 ( subtract x from both sides )

4x - 8 = - 20 ( add 8 to both sides )

4x = - 12 ( divide both sides by 4 )

x = - 3

substitute x = - 3 into (2)

y = x - 20 = - 3 - 20 = - 23

solution is (- 3, - 23 )