I don't under stand this pls help

Asap 25 pts brainliest to right best/answer

Solve 2x+y=3 x+y=5 in substitution method

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.