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Evaluate the expression when
[tex]
\begin{array}{c}
x = -2 \text{ and } y = 4. \\
-x + 3y - 17 = [?]
\end{array}
\]


Sagot :

Let's evaluate the expression [tex]\(-x + 3y - 17\)[/tex] when [tex]\(x = -2\)[/tex] and [tex]\(y = 4\)[/tex].

1. First, substitute [tex]\(x\)[/tex] and [tex]\(y\)[/tex] with the given values in the expression:
[tex]\[ -(-2) + 3 \cdot 4 - 17. \][/tex]

2. Simplify the term [tex]\(-(-2)\)[/tex]:
[tex]\[ -(-2) = 2. \][/tex]

3. Next, compute the multiplication [tex]\(3 \cdot 4\)[/tex]:
[tex]\[ 3 \cdot 4 = 12. \][/tex]

4. Substitute the simplified terms back into the expression:
[tex]\[ 2 + 12 - 17. \][/tex]

5. Add 2 and 12:
[tex]\[ 2 + 12 = 14. \][/tex]

6. Finally, subtract 17 from 14:
[tex]\[ 14 - 17 = -3. \][/tex]

Therefore, the result of the expression [tex]\(-x + 3y - 17\)[/tex] when [tex]\(x = -2\)[/tex] and [tex]\(y = 4\)[/tex] is [tex]\(-3\)[/tex].