Solve the system of equations using substitution.
4x + y = 32
y = 4x

James adds two numbers a + b. sally adds the same two numbers but reverse the order b + a what property of addition assures us that james and sally will get the same sum

Which shows the correct substitution of the values a,b and c from the equation 1=-2x+3x^2+1

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?