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R+5= -13?
How to solve:
What plus five equals -13?
So, what plus five equals positive 13? That would nine.
So add a negative sign.
-9 + 5 = -13
So R= -9
Wait a minute. If R was -9, adding it to five would make -4. Ask your math teacher. If you don't know the answer here, you need to get back to some very basic addition and number knowledge.