Commutative because your switching the order
Substitute -3 to the function equation where x found . therefore it will be 19--3=22. the final answer is 22
Answer:
25.5 and 37.5
Step-by-step explanation:
x+y=63
x-y = 12 then x = 12 + y sub this into the first equation
(12+y) + y = 63
12 + 2y = 63
2y = 51
y = 25.5 then x = 37.5
