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Verified answer
Mapel : MatematikaKelas : VII SMP
Bab : Aljabar dasar
Pembahasan :
A - B = (3x + 5y) - (4x - 2y)
A - B = 3x + 5y - 4x + 2y
A - B = (3 - 4)x + (5 + 2)y
A - B = -x + 7y
A - ½B = (3x + 5y) - ½(4x - 2y)
A - ½B = 3x + 5y - 2x + y
A - ½B = (3 - 2)x + (5 + 1)y
A - ½B = x + 6y
3A - 1½B = 3(3x + 5y) - 3/2(4x - 2y)
3A - 1½B = 9x + 15y - 6x + 3y
3A - 1½B = (9 - 6)x + (15 + 3)y
3A - 1½B = 3x + 18y