Answer: 14x+4y
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Explanation:
x is a variable or placeholder for a number. Think of it like a box.
1x = 1 box
2x = 2 boxes
and so on
9x = 9 boxes
5x = 5 boxes
9x+5x = 9 boxes + 5 boxes = 14 boxes = 14x
So that's one way to see how 9x+5x = 14x.
Or you could add the coefficients 9 and 5 to get 9+5 = 14. Then tack an x onto everything.
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The y terms are handled in a similar fashion.
-5y + 9y = 4y
which is the same as
9y - 5y = 4y
You could think of it like this
(9 yaks) - (5 yaks) = 4 yaks
So we started with 9 yaks and took away 5 of them to be left with 4 yaks.
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After getting the results 14x and 4y. We would then have the final answer 14x+4y
The x and y terms cannot be combined since they are not like terms. So we leave that expression as is.
