SOLUTION: i need help on this question: d/-3+7=10 i need to find D

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Question 160023This question is from textbook Prentice Hall Chourse 2 mathematics
: i need help on this question: d/-3+7=10 i need to find D This question is from textbook Prentice Hall Chourse 2 mathematics

Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
D%2F%28-3%29%2B7=10
Subtract 7 from both sides.
D%2F%28-3%29%2Bcross%287-7%29=10-7
D%2F%28-3%29=3
Multiply both sides by (-3).
cross%28-3%29%2A%28D%2Fcross%28%28-3%29%29%29=%28-3%29%2A3
D=-9
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Check your answer.
D%2F%28-3%29%2B7=10
%28-9%29%2F%28-3%29%2B7=10
3%2B7=10
10=10
Your answer led to a true statement.
It's a good answer.