Mathematics
12.01.2020 00:56
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The sum of 3 times a number and 5 is 2 times the number plus 15. what is half the
The sum of 3 times a number and 5 is 2 times the number plus 15. what is half the number?
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Brayner14
5,0(30 marks)
Define x:
Let the sum be x
Construct the equation:
The sum of 3 times a number and 5 is 2 times the number plus 15.
→ 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
The number is 10.
Let the sum be x
Construct the equation:
The sum of 3 times a number and 5 is 2 times the number plus 15.
→ 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
The number is 10.
goodkida7
4,4(86 marks)
190
Step-by-step explanation:
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