Take 3x + 7y - x + 12y as an example.
Collecting similar terms gives 3x - x + 7y + 12y ie 2x + 19y. Get it?
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They are called "like terms".
Take 3x + 7y - x + 12y as an example. Collecting similar terms gives 3x - x + 7y + 12y ie 2x + 19y. Get it?
16x + 16x would be an example of similar terms. Both have corresponding variables (x). The coefficient does not have to be the same for it it have similar terms. Terms are based only on the variable. 16x² + 32x² are similar terms. 16x² + 32x³ are not similar terms.