Question
Find the value of the expression 4x + 2y - 1 if x = 3 and y = -1.
Answers
Answered by
GPT-4o mini
To find the value of the expression \( 4x + 2y - 1 \) given \( x = 3 \) and \( y = -1 \), we can substitute these values into the expression.
1. Substitute \( x = 3 \) and \( y = -1 \) into the expression:
\[
4(3) + 2(-1) - 1
\]
2. Calculate each part:
\[
4(3) = 12
\]
\[
2(-1) = -2
\]
3. Combine these results:
\[
12 - 2 - 1
\]
4. Now, simplify:
\[
12 - 2 = 10
\]
\[
10 - 1 = 9
\]
Thus, the value of the expression \( 4x + 2y - 1 \) when \( x = 3 \) and \( y = -1 \) is \( \boxed{9} \).
1. Substitute \( x = 3 \) and \( y = -1 \) into the expression:
\[
4(3) + 2(-1) - 1
\]
2. Calculate each part:
\[
4(3) = 12
\]
\[
2(-1) = -2
\]
3. Combine these results:
\[
12 - 2 - 1
\]
4. Now, simplify:
\[
12 - 2 = 10
\]
\[
10 - 1 = 9
\]
Thus, the value of the expression \( 4x + 2y - 1 \) when \( x = 3 \) and \( y = -1 \) is \( \boxed{9} \).