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We begin by addressing the innermost parentheses:
Remember that:
When we multiply a negative number by a negative number, the result will be positive.
Thus we obtain:
Next we address the exercise within the parentheses:
Remember that:
When we multiply a positive number by a negative number, the result will be negative.
We join the x coefficients:
We join the z coefficients:
We obtain the following:
\( 100-(5+55)= \)
When you have a negative outside parentheses and a negative inside, they multiply to make positive! Think of it as .
Work step by step! First handle the innermost parentheses , then distribute the outer negative: .
Rewrite each step clearly! Start with , then , then .
No! You can only combine like terms. The x-terms (31x and -34x) combine separately from z-terms (5z and -13z). Variables with different letters stay separate.
Look for terms with the same variable and same power. Here: and . Different variables never combine!
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