Question

What are the like terms of 10a+4b+3a-15b

Answer 1

10a + 3a are like terms because of the a. This equals to 10a

4b-15b are like terms because of the b and this equals to -11b

Expression: 10a-11b

Answer 2

The like terms in 10a+4b+3a-15b consist of a and b. First, we have to combine like terms.
(10a+3a) + (4b-15b)
solve a and b
13a - 11b. Thus, the like terms in your original expression are 13a and -11b :)