Question

Tolong bantu jwb soal2 berikut yaa ???

Answer 1

12.
p=3x+1
l=2x+2

K=2(p+l)
36=2{(3x+1)+(2x+2)}
36=2(5x+3)
36=10x+6
36-6=10x
30/10=x
x=3

jadi panjang=3x+1=3.3+1=10
lebar=2x+2=2.3+2=8

Answer 2

12)
kel=2.(p+l)
36=2.((3x+1)+(2x+2))
36=2.(5x+3)
36=10x+6
36-6=10x
30:10=x
x=3

15)
f(k)=2x+5
13 =2x+5
13-5=2x
8:2 =x
x =4
jadi, k=4