Evelyn is thinking of a number, n and she wants her sister to guess the number. Her first clue is that one less than two times her number is between five and fifteen. Write a compound inequality that shows the range of numbers that Evelyn might be thinking

The value of x in this system of equations is 1. 3x + y = 9 y = –4x + 10 substitute the value of y in the first equation: combine like terms: apply the subtraction property of equality: apply the division property of equality: 3x + (–4x + 10) = 9 –x + 10 = 9 –x = –1 x = 1 what is the value of y?