materi : aljabar
1. ( 5x + 2y ) - ( 6y - 4y )
jawab :
= 5x + 2y - 6y - 4y
= 5x - 8y - 4y
= 5x -12y
2. -2x - 8y + 7y -3x + 5
= -2x - 3x - 8y + 7y + 5
= -5x - y + 5
3. ( 7a + b + (-9a) - 8b
= 7a - 9a + b - 8b
= 2a - 7b
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materi : aljabar
1. ( 5x + 2y ) - ( 6y - 4y )
jawab :
= 5x + 2y - 6y - 4y
= 5x + 2y - 6y - 4y
= 5x - 8y - 4y
= 5x -12y
2. -2x - 8y + 7y -3x + 5
jawab :
= -2x - 3x - 8y + 7y + 5
= -5x - y + 5
3. ( 7a + b + (-9a) - 8b
jawab :
= 7a - 9a + b - 8b
= 2a - 7b