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First, we open the parentheses and change the sign accordingly.
Since there are only positive numbers inside the parentheses, multiplying by negative will give us negative numbers:
Now we group the X factors:
Now we group the Y factors:
Now we obtain:
\( 60:(10\times2)= \)
The negative sign acts like multiplying by -1. When you multiply , you get because every term gets multiplied.
You'll get the wrong answer! For example, if you write instead of , you'd get 16y-9x instead of the correct -9x.
Group terms with the same variable: put all x terms together and all y terms together. Then add or subtract the coefficients (numbers in front).
When coefficients are opposites like and , they equal zero and disappear from your answer. This is totally normal!
Yes! Substitute any value for the variables into both the original expression and your simplified answer. If they give the same result, you're correct!
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