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math help. plz tell me how you find it ouy?

Which are a pair of like terms? (1) 5x and 7y (2) 5x and 7x to the second power (3)5x and 7x(4)-5x and -5y

im fairly sure its 4 right? if not tell me how u get it 4 the other answer

1 Answer

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  • 1 decade ago
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    Number 3 is a pair of like terms. like terms always has the same variable and u can combine them.

    5x and 7x

    as u can see, both 5 and 7 has the variable x. so u can combine them and get the same answer.

    For example, if u do 5x + 7x u get 12x. Let's say x=2

    5(2) + 7(2) = 10 + 14

    =24

    12(2) = 24 u get the same answer.

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