i dont understand is it just one or more operations
what is the operation for combining like terms
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Let's say you have 7(2x - 4) + (7 + 5x)
Combining like terms needs to be done after when you have expanded the terms in the brackets:
you will multiply (2x - 4) by 7 to get 14x - 28
then try to combine the like terms in this form
14x -28 + (7 + 5x)
14x - 28 + 7 + 5x
5x and 14x are like terms so as well as 7 and - 28
now we have
14x + 5x +7 - 28
Solving this we get:
I hope this helps.