Answer:
(-13m - 1)/(n + 5).
Step-by-step explanation:
-5m-9/n+5 + -8m+8/n+5
The denominators are the same so we add the numerators:
= (-5m - 9 - 8m + 8 / (n + 5)
= (-13m - 1)/(n + 5).
Define x:
Let the sum be x
Construct the equation:
<span>The sum of 3 times a number and 5 is 2 times the number plus 15.
</span>→ 3x + 5 = 2x + 15
Solve x:
3x + 5 = 2x + 15 | Equation
x + 5 = 15 | Take away 2x from both sides
x = 10 | Take away 5 from both sides
Answer: The number is 10.