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Kelas : 1 SMP/7
Pembahasan :
Diketahui :
Baris kedua :
5 (3+x) (x+1)
Baris ketiga :
(8 + x) (4 + 2x)
Baris ketiga :
(12 + 3x) = 2x
Ditanyakan :
Nilai x?
Jawaban :
12 + 3x = 2x
3x - 2x = -12
x = -12
Jadi, nilai x = -12