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First, let's address the expression in the innermost parentheses.
Remember that when we multiply a negative number by a negative number, the result will be positive.
Now we get:
Let's now look at the expression in parentheses while remembering rule:
When we multiply a positive number by a negative number, the result will be negative.
We get:
Now let's combine the y coefficients:
Now let's combine the z coefficients:
This leaves us with:
\( 100-(5+55)= \)
When you have a negative times a negative, the result is always positive! Think of it as: . This is a fundamental rule in algebra.
The minus sign acts like multiplying by -1. Distribute it to every single term inside the parentheses: .
Always work from the inside out:
Group terms with the same variable: all x terms together, all y terms together, all z terms together, and constants together. Then add or subtract their coefficients.
Take it step by step! Write out each step clearly and double-check your work. Remember: when distributing a negative, every term inside changes sign.
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