Question

\ Use the given property to complete the statement. Substitution Property of Equality If y = 3, and 8x + y = 12,

Answer 1

the answer is x= 1.125

Answer 2

 8x + y = 12 substitute 3 for y
8x + 3 = 12 
8x = 9 
x = 9/8 

If y = 3 and 8x + y = 12, then x = 9/8.