The ages of four sisters are consecutive even integers. two times the age of the youngest sister exceeds the oldest sister's age by 30 years. the equation 2x − (x + 6) = 30 models the age, x, of the youngest sister. what is the age of the oldest sister?

The monthly texting plan of all star cell is $11 per month and $0.25 per text. the monthly texting plan of top line cell is $14 per month and $0.15 per text. a student wants to set up a system of equations to find the number of texts for which the total monthly cost of the two companies is the same. he uses the variables x and y. he lets y represent the total monthly cost. what will x represent? x = number of texts x = cost of the total number of texts x = total monthly cost x = cost of each text