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3 votes
Rianna thinks that if a=b and of c=d , then a+c=b+d . Is she correct?

User HFBrowning
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2 Answers

3 votes
hello
rihanna had right, she is correct if a=b and of c=d, then a+c=b+d
User Jeca
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Substitute the A and C for B and D, so Yes she is correct.
User Bensiu
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