1) (x / 2) + 5 = 6 a) x = 2 b) x = -2 c) x = 22 d) x = -22 2) 8 - (3x / 4) = -1 a) x = 6.75 b) x = -6.75 c) x = 12 d) x = -12 3) (1 - 2x) / 5 - (1 / 3) = 2 / 15 a) x = 2 / 3 b) x = -2 / 3 c) x = 3 / 2 d) x = -3 / 2 4) Given a formula P = (-7r - 13) x 6, find the value of r if P = 48 a) r = 3 b) r = -3 c) r = 5/7 d) p = -5/7 5) There were p flowers in a pot. Six of them became dry and were taken away yesterday, and 3 new flowers were put into the pot today. If there are 16 flowers in the pot, which of the following is the correct equation? a) p + 6 + 3 = 16 b) p + 6 - 3 = 16 c) p - 6 + 3 = 16 d) p - 6 - 3 = 16 6) Carol runs at a speed of 6 m/s. The running speed of Angela is x m/s more than that of Carol. If the running speed of Angela is 8 m/s, find the value of x. a) x = 1 b) x = 2 c) x = 3 d) x = 4 7) Samuel has $A. He buys 6 packs of potato chips and gets back $9.2. If the price of each pack of potato chips is $6.8, what is the value of A? a) A = 42 b) A = 45 c) A = 48 d) A = 50 8) A doctor precribed a bottle of medicine to Judy and advised her to take the medicine in 15 doses. It is known that 88 mL of medicine was left after Judy had take 7 doses. Find the original volume of the medicine. a) 155 mL b) 160 mL c) 163 mL d) 165 mL 9) The new staff members join a company which has 3 departments. After their joining, each department has 12 staff members. What is the total number of staff members in the company before the new staff members join the company? a) 24 b) 26 c) 28 d) 30 10) A company produces x units of a certain item, but 20% of the units are found to be defective and are scrapped. If each unit sells for $50 and the total revenue from the sale is $3000, what is the value of x? a) x = 75 b) x = 78 c) x = 80  d) x = 82

Linear Equation Exercise 4

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