6a + 18b - 8b- 20a
is the answer 26a + 10b
kiwi, post these on the original question, so we don't have to go back and forth. It is confusing.
6(a+3b)- 4(2b-5a)
You missed the sign on 20a. Notice you have a -4 times -5a. That give a POSITIVE 20a
Kiwi, your answer is right, 26a+10b. I did it in a hurry. Sorry. Please followup on the same post, not new ones.
To simplify the given expression 6a + 18b - 8b - 20a, we can combine the like terms. Like terms are terms that have the same variable(s) raised to the same power(s).
Let's combine the terms with the variable 'a' first. We have 6a - 20a. To combine these terms, we add or subtract their coefficients (the numbers in front of the variables). In this case, 6a - 20a equals -14a.
Next, let's combine the terms with the variable 'b'. We have 18b - 8b. Similar to before, 18b - 8b equals 10b.
Now we can put the combined terms together to get the simplified expression: -14a + 10b.
Therefore, the correct answer is -14a + 10b, not 26a + 10b.