Observe each of them and identify if there is a mistake. If you think there is a mistake, try to explain what might have gone wrong. Then, correct it and give the value of the expression.
1. If \(f = 5\), \(g = 3\), then \(2f – 2g = 2\). The correct expression is
2. If \(t = 5\), \(b = 0\), then \(3t + b = 15\). The correct expression is