Combine like terms:-5r+8r+5

(I am 14 and I am in high school and i should know this but I don't)

3r+5

Step-by-step explanation:

This is the answer because your adding a negative number and a positive number so you answer will be negative. but 8 is bigger than 5 so you just take away 5 from 8 you get 3. Think about it without the r solve then add the r (dont do this with exponents.)

Answer: 3r+5

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Step-by-step explanation:

Solution for - 5r+8r=5 equation: Simplifying - 5r + 8r = 5 Combine like terms: - 5r + 8r = 3r 3r = 5 Solving 3r = 5 Solving for variable 'r'.