7a+(8b) +(-15a)+9b + (-4c)+8=
2 answers:
-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
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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