help. kunci jawabannya A. bantu dengan cara lengkapnya mengapa bisa A
5x - 7 = 3x + 13
5x - 3x = 13 + 7
2x = 20
x = 10
Substitusi
Panjang = 2x + 5
= 2(10) + 5
= 25 m
Lebar = 3x - 10
= 3(10) - 10
= 20 m
Luas = p x l
= 25 m x 20 m
= 500 m²
5x - 7 = 3x + 13
5x - 3x = 13 + 7
2x = 20
x = 10
Substitusi
Panjang = 2x + 5
= 2(10) + 5
= 25 m
Lebar = 3x - 10
= 3(10) - 10
= 20 m
Luas = p x l
= 25 m x 20 m
= 500 m²