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The sum of a number and 1515 is −23-23. Find the number\newlineThe unknown number is\newline(Simplify your answer.)

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Full solution

Q. The sum of a number and 1515 is −23-23. Find the number\newlineThe unknown number is\newline(Simplify your answer.)
  1. Denote Unknown Number: Let's denote the unknown number as xx. According to the problem, the sum of xx and 1515 is −23-23. We can write this as an equation:\newlinex+15=−23x + 15 = -23
  2. Write Equation: To find the value of xx, we need to isolate it on one side of the equation. We can do this by subtracting 1515 from both sides of the equation:\newlinex+15−15=−23−15x + 15 - 15 = -23 - 15
  3. Isolate Unknown x: Simplifying both sides of the equation gives us:\newlinex=−23−15x = -23 - 15
  4. Simplify Equation: Now we perform the subtraction on the right side of the equation: x=−38x = -38

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