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4x + 6 + 2x - 10
4x + 2x + 6 - 10
6x - 4
13. 3a + b - c
3(p+q) + (2p-q) - 2p-3q
3p + 3q + 2p - q - 2p + 3q
3p + 5q
14. jawabnnya A