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Mathematics
Maria Heath
8 February, 19:38
7a + (8b) + (-15a) + 9b + (-4c) + 8=
+5
Answers (
2
)
Rangel
8 February, 20:52
0
-8a+17b-4c+8
steps:
when there is a "+" in front of the parenthesis the expression remains the same.
7a+8b-15a+9b-4c+8
Collect the like terms
7a+8b-15a+9b-4c+8
7a and 15a
8b and 9b
15a-7a = - 8a
9b+8b = 17b
Final answer:
-8a+17b-4c+8
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Jon Larson
8 February, 23:36
0
7a + (8b) + (-15a) + 9b + (-4c) + 8
7a+8b-15a+9b-4c+8 (changing some of the symbols)
7a-15a+8b+9b-4c+8
=-8a+17b-4c+8
Answer: - 8a+17b-4c+8
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