a is 2x b is x c is 2x plus 1 2x plus x plus 2x plus 1 Combine all terms 5x plus 1 subtract 1 75 divide by 5 = 15 a is 30 b is 15 c is 31

first you going need to take 76 times 2 and than add 1 cm and the divide by the 3 sides and tha thsould get your answer :0 good luck