Friday, August 06, 2010
ANSWER to Maths Question ~ 2011 Feb 21 (Algebra Method)
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Here's my working & answer to a Maths Question I posted...
This is the Algebra Method of solving. 'Click Here for the Non-Algebra Method'.
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Question:
Minah is 18 yrs older than Aishah.
Answer:
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Here's my working & answer to a Maths Question I posted...
This is the Algebra Method of solving. 'Click Here for the Non-Algebra Method'.
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Question:
Minah is 18 yrs older than Aishah.
In 6 yrs time, Minah's age will be twice as much as Aishah.
What is Aishah's age now?
Let,
Minah be ‘M’
Aishah be ‘A’
We’ve got to find ‘A’ which is Aishah’s age now.
Equation-01 ► M = A + 18
In 6 years time,
Equation-02 ► M + 6 = 2 (A + 6)
Using Equation-02
Substitute the 'M' from Equation-01
.
M + 6 = 2 (A + 6)...Equation-02
A + 18 + 6 = 2 (A + 6)...Substitute 'M' from Equation-01
A + 18 + 6 = 2A + 2 x 6...use Basic Algebra Rules to solve
A + 18 + 6 = 2A + 12
A + 24 = 2A + 12
A = 2A + 12 – 24
A = 2A – 12
A – 2A = – 12
– A = – 12
A = 12
.
Therefore, Aishah's age now is = 12 Years Old
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