I need help with this question, please do it in steps!

3x-y=5

Sheila wants to bake six muffins but the recipe is for 12 muffins . this means you only need half of the ingredients listed how much of the of each ingredient does she need? one cup and banana chips ,7 tablespoons oil , two eggs, 3/4 cups flour 1/4 cup walnuts show all you work and justify your answer using a baby toulmin.

You give a $4 tip for a meal that cost $22. approximately what percent of the bill was your tip?

Give me the equations of two lines that have the same slope but are not parallel.