F) When writing an expression, what is the name for the letter in your formula? This letter can be any letter of the alphabet. For example, 6n-2, what is the
name for the "n"? (1 point)

50 will mark show all use the linear combination method to solve the system of equations. explain each step of your solution. if steps are not explained, you will not receive credit for that step. 2x+9y= -26 -3x-7y=13