Find the value of two numbers if their sum is 12 and their difference is 4

Which of the following is the correct ratio for converting kilograms to grams

X+ y = 5 ; x - y =3 solve using linear combination

Which questions would most a reader identify the author's purpose for writing? check all that apply. what type of text is this? what type of reviews did the book receive? how many copies of the book have been sold? what is the central idea? how does this text make one feel?