Tolong dong no.2 cara dan jwbannya yaaa

a. K = 2(p+l)
62 = 2(3x+2 + 2x-1)
62 = 6x+4 + 4x-2
62 = 10x + 2
62 - 2 = 10x
x = 60 : 10
x = 6

b. 3(6)+2 = 18 + 2
= 20
2(6)-1 = 12 - 1
= 11