Why 3x + 7x is not 10x² ?
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3x and 7x are like terms and you can add or subtract only like terms.
And when we add or subtract them, we just focus on the coefficients.
So here 3x + 7x = 10x
And when we add or subtract them, we just focus on the coefficients.
So here 3x + 7x = 10x
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