SOLUTION: a is now 4 times as old as b
.five year s ago a was 7 times as old as b was then.
find the present age.
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Question 1011523: a is now 4 times as old as b
.five year s ago a was 7 times as old as b was then.
find the present age.
Answer by MathLover1(20850) (Show Source): You can put this solution on YOUR website!
is now times as old as :
.....eq.1
five years ago was times as old as was then:
....eq.2
solve the system:
.....eq.1
....eq.2
------------------------------substitute from eq.1 in eq.2
....eq.2....solve for
-> the present age
then => -> the present age
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