Consider the equation 18x+12y=72 if x=0 , find the value of y that satisfies the equation

Adj has a total of 1075 dance and rock songs on her system. the dance selection is 4 times the size of the rock selection. write a system of equations to represent the situation.

Which steps could be part of the process in algebraically solving the system of equations, y+5x=x^2+10 and y=4x-10

How many quarts of a 50% solution of acid must be added to 20 quarts of a 20% solution of acid in order to get a 40% solution of acid?