The Ratio Of James’ Age To Andy’s Age Is 2:7. In 8 Years’ Time,the Ratio Will Become 2:5. Find James… termasuk salah satu pertanyaan yang banyak dicari dan bisa teman-teman baca jawabannya disini.
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The Ratio Of James’ Age To Andy’s Age Is 2:7. In 8 Years’ Time,the Ratio Will Become 2:5. Find James’ Age Present Age
Jawaban: #1:
Let :
James’ age now = x
Andy’s age now = y
x : y = 2 : 7
or
7x = 2y
8 years from now, their age will be :
James’ age = x + 8
Andy’s age = y + 8
With the ratio of
(x + 8) : (y + 8) = 2 : 5
We can simplify the second term into
5(x + 8) = 2(y + 8)
5x + 40 = 2y + 16
5x – 2y = -24
Substitute the first term into the second one
5x – 2y = -24
5x – (7x) = -24
-2x = -24
x = 12
So, James’ age now is 12 years old.
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