Jawabanmu

2014-02-05T17:10:13+07:00
(2*+3) x 5 =50
2*+3=50/5
2*+3=10
2*=10-3
*=7/2
*=3,5

p=2*+3
  =2.3,5+3
  =7+3
  =10

K=2(p+l)
  =2(10+5)
  =2 x 15=30 cm
1 5 1
2014-02-05T17:58:34+07:00
L = p x l
50 = (2*+3) x5
50 = 10* + 15
50 - 15 = 10*
35 = 10*
 \frac{35}{10} = *
3,5 = *

p = 2*+3
    = 2 x 3,5 + 3
    = 10

Keliling = 2(p+l)
           = 2(10+5)
           = 2 x 15
           = 30