Question

find the value "a" in the equation ax + y = 5 if (1,2) is a solution of this equation ​

Answer 1

Answer:

$a = 3$

Step-by-step explanation:

Given, ax + y = 5

Since (1, 2) is the solution of this equation

$a(1) + 2 = 5$

$a + 2 = 5$

$a = 5 - 2 \\ = 3$