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primary 6 | Maths
| Algebra
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Algebra
Date Posted: 4 years ago
Views: 255
Sam's current age: e
Sam's age in 10 years: e + 10
Mother's age in 10 years: 3 * (e + 10), or 3e + 30
Mother's age now: 3e + 30 - 10 = 3e - 20
Sam's age in 10 years: e + 10
Mother's age in 10 years: 3 * (e + 10), or 3e + 30
Mother's age now: 3e + 30 - 10 = 3e - 20
Normally what you do is this.
"Sam is 5 years old now. In 10 years time, his mother will be thrice as old as he."
Sam's age in 10 years = 15
Mother's age = 15 * 3 = 45
Mother's age now = 45 - 10 = 35
We do likewise for the question, except with e instead of 5.
"Sam is 5 years old now. In 10 years time, his mother will be thrice as old as he."
Sam's age in 10 years = 15
Mother's age = 15 * 3 = 45
Mother's age now = 45 - 10 = 35
We do likewise for the question, except with e instead of 5.
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Hope this helps
Date Posted:
4 years ago
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