la cuarta parte del triple del doble del quíntuple de la tercera parte de un número es 20 cuál número es?​

Can someone me and do the problem plz so i can understand it more better

Alana has 12.5 cups of flour with which she is baking four loaves of raisin bread and one large pretzel. the pretzel requires 2.5 cups of flour to make. how much flour is in each loaf of raisin bread? explain the steps to follow to get the answer.

In need of in the diagram, ∠abc is a right angle. ∠dbc = 30°27'40". find the measure of ∠abd.