Question
The sum of 38 and twice a number x is 124. What is −2x − 5?
Answers
GPT 3.5
Let's solve the equation step by step.
Let's represent the number x as "n".
Twice a number x is 2n.
The sum of 38 and twice a number x is 38 + 2n.
According to the problem, the sum of 38 and twice a number x is 124. So, the equation becomes:
38 + 2n = 124.
Now, let's solve for n:
2n = 124 - 38,
2n = 86,
n = 86/2,
n = 43.
Now let's calculate -2x - 5 using the value of x:
-2(43) - 5,
-86 - 5,
-91.
Therefore, -2x - 5 is equal to -91.
Let's represent the number x as "n".
Twice a number x is 2n.
The sum of 38 and twice a number x is 38 + 2n.
According to the problem, the sum of 38 and twice a number x is 124. So, the equation becomes:
38 + 2n = 124.
Now, let's solve for n:
2n = 124 - 38,
2n = 86,
n = 86/2,
n = 43.
Now let's calculate -2x - 5 using the value of x:
-2(43) - 5,
-86 - 5,
-91.
Therefore, -2x - 5 is equal to -91.