Solve using any method you prefer 2 5/7 + 3 6/7

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.

If 1/√5+1/√5+1=p+q√r , find the values of p, q and r

The difference of three and the reciprocal of a number is equal to the quotient of 20 and the number. find the number.