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= 2(3x-4+x+3)
= 2(4x-1)
= 8x - 2
b) Tidak bisa cari nilai x karena harus ada tambahan diketahuinya
lebar = (x + 3)
1) Kel = 2 (p + l)
= 2 (3x - 4 + x + 3)
= 2 (4x - 1)
Kel. persegi panjang = 8x - 2
2) --