Sederhanakanlah. 1. 4x + 7 + 5x + 8 2. -3a + 5 + 9a – 2 3. 2x – 12 – 6x + 15

Sederhanakanlah.
1. 4x + 7 + 5x + 8
2. -3a + 5 + 9a – 2
3. 2x – 12 – 6x + 15
4. -a + 2 – 3 – 8a

Jawaban
(1) 9x + 15 (3) -4x + 3
(2) 6a + 3 (4) -9a – 1

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