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liberstina [14]
3 years ago
13

The sum of 3 times a number and 5 is 2 times the number plus 15. what is half the number?

Mathematics
1 answer:
saul85 [17]3 years ago
5 0
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.
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