To simplify the expression 5A - 8C + B + 3C - 9A + 6B, let's group like terms:
(5A - 9A) + (B + 6B) + (-8C + 3C)
Simplifying each group of like terms:
-4A + 7B - 5C
Simplify 5A minus 8C plus B plus 3C minus 9A plus 6B
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