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Verified answer
Mapel : MatematikaBab : Aljabar
A]
-m + 6mn + 2m - 3mn
= -m + 2m + 6mn - 3mn
= m + 3mn
B]
3a - 4 - ( 8a - 5 )
= 3a - 4 - 8a + 5
= 3a - 8a - 4 + 5
= -5a + 1
C]
3x - 7y - ( -4x - 8y )
= 3x - 7y + 4x + 8y
= 3x + 4x - 7y + 8y
= 7x + y
= -m + 2m + 6mn - 3mn
= m + 3mn
b. 3a - 4 - (8a - 5)
= 3a - 8a - 4 + 5
= -5a + 1
c. -4x - 8y - (3x - 7y)
= -4x - 3x - 8y + 7y
= -7x -y