Choose the correct option which indicates all the like terms in the following expression.
$3 x + 5 x + 7 y + 9 x - 4 y$

$(- 4 y, 7 y)$

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$(7 y, - 4 y), (3 x, 5 x)$

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$(7 y, - 4 y), (3 x, 5 x, 9 x)$

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$(3 x, 5 x, 7 y)$

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Solution

The correct option is C
$(7 y, - 4 y), (3 x, 5 x, 9 x)$

Terms containing the same variables raised to the same power are called as like terms.

$Here, 3x, 5x and 9x are like terms.$
$Similarly, 7y and -4y are like terms.$

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5 \sqrt{x} - 4 \sqrt{y} + 2; 2 \sqrt{x} + 7 \sqrt{y} - 5

5 x + 4 y - 3 x - 7 y + 8 x

13 x y, 7 x, 8 y, - x^{2} y^{2}, - 7 x y, - 200 x, 12 x^{2} y^{2}, 21, - 7 y, - 5 x, 12 x y, - 3 x, 4 y

Which of the pairs given in options will add up to give $9 x + 5 y$ ?

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