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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 minus will give us negative numbers:
Now we group the factors and:
Now we obtain:
\( 100-(5+55)= \)
The negative sign in front of the parentheses acts like multiplying by -1. This means every term inside gets its sign flipped: positive becomes negative, and negative becomes positive.
The first expression has a negative sign before parentheses, so you must distribute it. The second has no parentheses, so you work left to right. They give completely different answers!
Group terms with the same variable: all y-terms together, all z-terms together. Then add or subtract the coefficients: .
Sometimes yes, but be careful! In this problem, , giving us . Then distribute the negative sign.
That's okay! Your final answer might have multiple variables like . Just make sure all terms are simplified and in standard form.
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