Tolong jawab please​

2. 68 = 2{(3y-1)+(y+3)

68 = 2(4y+2)

68 = 8y + 4

8y = 68 – 4

8y = 64

y = 64 : 8

y = 8

a. Lebar = y + 3

= 8 + 3

= 11 cm

b. Panjang = 3y – 1

= 3(8) – 1

= 24 – 1

= 23 cm

Luas = p × l

= 23 × 11

= 253 cm²

3. Luas = 2L.trapesium + L. layang-layang

= 2{(15+6) × 8 / 2) + (8 × 27 / 2)

= 2(84) + 108

= 168 + 108

= 276 cm²

MAAF JIKA SALAH