Question

If x = 3 solves the system shown below , what must be the value of a? y = 5x - 8 y = ax + 19

Answer 1

Answer:

a = -4

Step-by-step explanation:

Plug in 3 for x to solve y = 5x -8 (it equals 7).

Then plug in 7 for y in the next equation y = ax + 19.

This leads to 7 = 3a + 19.

Then you simplify the equation using PEMDAS or BODMAS (UK version).