Tuesday, September 27, 2011

Worksheet 9 Classwork 1 - Dylaine Ho (01) & Jamie Lim (02)


[1/2(x+2)] + (3x+2) + [7/4(7x-4/7)] = 47
(1/2)x + 1 + 3x + 2 + (12 1/4)x - 1 = 47
(1/2)x + 3x + (12 1/4)x = 47 + 1 - 1 - 2
(63/4)x = 45
63x = 180
x = 2 6/7

If x = 2 6/7,

(1/2)x + 1 = (1/2)(2 6/7) + 1 = 1 3/7 + 1 = 2 3/7

3x + 2 = 3(2 6/7) + 2 = 8 4/7 + 2 = 10 4/7

(12 1/4)x - 1=  (12 1/4)(2 6/7) - 1 = 35 - 1 = 34

The three lengths are (2 3/7)cm, (10 4/7)cm and 34 cm.

4 comments:

  1. clear and easy to follow - awesome effort

    ReplyDelete
  2. Easy to understand, detailed solution

    ReplyDelete