Solve the following:

1) -8x = 4 (2 marks)

2) 5x + 8 = -x - 16 (3 marks)

3) 2(1 - x) + 5 = -3x - 1 (4 marks)

4) 2(y - 3) - 3y = 4y - 1 (4 marks)

5) Isolate z for the formula, 2z + y = x (2 marks)

6) Isolate a for the formula, c = 3(a + b) (3 marks)

7) A scoop of ice cream has 5 mg of cholesterol less than a hamburger. A scoop of ice cream and a hamburger have a total amount of cholesterol of 37 mg. How much cholesterol does each food contain? (4 marks)

8) A car and a train depart in opposite directions from the same location and at the same time. If the car travels at 95 km/h and the train travels at 115 km/h, when will the car and the train be 525 km apart? (4 marks)

9) A biology textbook cost $89 and a chemistry textbook cost $74. A purchase order for