Penjelasan dengan langkah-langkah:
a. 7a + a = 8a
b. y-3y-7y = 1y-3y-7y = (1-3-7)y = -9y
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Penjelasan dengan langkah-langkah:
a. 7a + a = 8a
b. y-3y-7y = 1y-3y-7y = (1-3-7)y = -9y