Question

can we add 2 2 & 3a? & how?​

Answer 1

Answer:

Whether you add or subtract variables, you follow the same rule, even though they have different operations: when adding or subtracting terms that have exactly the same variables, you either add or subtract the coefficients, and let the result stand with the variable.

For example:

Addition. In this equation, you can add all of the coefficients (2, 5, and 4) because the variables are the same (a).