4. Tuliskan bentuk aljabar yang hilang di setiap lingkaran kosong berikut.
(Soal No. 4 Uji Kompetensi Bab Operasi Aljabar Buku BSE Matematika Kurikulum 2013 Semester 1 Kelas 8, Kemendikbud)
Jawaban:
a) 7 − 5m + a = −8 + 15m
a = −8 + 15m − (7 − 5m)
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a) 7 − 5m + a = −8 + 15m
a = −8 + 15m − (7 − 5m)
a = −8 + 15m − 7 + 5m
a = −8 − 7 + 15m + 5m
a = −15 + 20m
a = −8 − 7 + 15m + 5m
a = −15 + 20m
b) −8 + 15m + 10 − 6m = b
b = −8 + 10 + 15m − 6m
b = 2 + 9m
b = 2 + 9m
c) a + 10 − 6m = c
−15 + 20m + 10 − 6m = c
−15 + 20m + 10 − 6m = c
c = −15 + 10 + 20m − 6m
c = −5 + 14m
c = −5 + 14m
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