Evaluating linear algebraic expressions Quiz

Given x = 3, evaluate (3x - 5) + (2x - 1)

Given that  x = 15, evaluate 2x - (x + 1)

Given that  n = 3, evaluate 3(n - 4) + 2n

Given that  t = -2, evaluate -5t + 4t - (2t - 1)

Given that  s = 5, evaluate -s + 5 - 20s