'Particular morning' presentation slideshows

Substitution: 4x+ 2y = 40 x+y = 13 -x -x y=-x+13 4x + 2(-x+13)=40 4x-2x+26 = 40 2x+26= 40

Once upon a time Old MacDonald had a farm. On his farm he had ducks that went a quack, quack here and cows that went a moo, moo there. He loved each one of his animals very much, so much he had a name for each of them. (13 names in all.)

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