Question

What is the solution to the system of linear equations? y = 4x + 7 { y = 8x + 19

Answer 1

Answer:

(- 3, - 5 )

Step-by-step explanation:

y = 4x + 7 → (1)

y = 8x + 19 → (2)

substitute y = 8x + 19 into (1)

8x + 19 = 4x + 7 ( subtract 4x from both sides )

4x + 19 = 7 ( subtract 19 from both sides )

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

x = - 3

substitute x = - 3 into either of the 2 equations and solve for y

substituting into (1)

y = 4(- 3) + 7 = - 12 + 7 = - 5

solution is (- 3, - 5 )

Answer 2

Answer:

(- 3, - 5 )

Step-by-step explanation:

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