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You may have forgotten to add the options

However, you can collect like terms

In other words, collect the 'x' values and collect the numbers

5x + 18x = 23x

-12 - 4 = -16

Thus, your answer would be 23x - 16.

Any further questions, let me know.

➶ Hope This Helps You!

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➶ Have A Great Day ^-^

ʜᴀɴɴᴀʜ ♡

The expression simplified is 23x - 16