Question

if X= a and y= 1 is the solution of the equation x + 3 y = 12 thenfind a​

Answer 1

a+3=12

a=12-3

a=9

is that ok for you

Answer 2

Answer:

a =9

Step-by-step explanation:

x = a

y = 1

To do:

x + 3y = 12

a + 3×1 = 12

a + 3 = 12

a = 12 - 3

a = 9

Verify:

x + 3y = 12

9 + 3 ×1 =12

9 + 3 = 12

12 = 12

LHS = RHS