pakai cara...................

Luas lahan pak Deni seluruhnya :
= 3/4 hektar + 4200 m^2
= (3/4 x 10000 m^2) + 4200 m^2
= 7500 m^2 + 4200 m^2
= 11700 m^2

Luas tanah yg diwakafkan :
= 4,5 are + 300m^2
= 4,5 x 100 + 300 m^2
= 450 m^2 + 300 m^2
= 750 m^2

Luas tanah pak Deni sekarang :
= 11700 - 750
= 10950 m^2 (D)

Semoga membantu:)

28. (2gros + 4 lusin) - (8 lusin + 6 buah)
= ((2x144) + (4x12)) - ((8x12) + 6)
= (288 + 48) - (96 - 6)
= 366 - 90
= 246

29. luas lahan :
= (3/4 hektare + 4.200m²) - (4,5are + 300m²)
= ((3/4x10.000)+4.200m²)-((4,5x100) + 300m²)
= (7500m² + 4200m²) - (450m² + 300m²)
= 11700m² - 750m²
= 10.950m²

semoga membantu