You can
put this solution on YOUR website!In two years time Geoff will be three times as old as he was ten years ago.
a)Using y for his present age, write down an equation connecting his present
age with his age ten years ago?
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Two things to note in this:
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Age in two years: (y+2)
Age 10 yrs ago: (y-10)
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In two yrs = 3 times age 10 yrs ago
y + 2 = 3(y - 10)
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b)Solve the equation.
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y + 2 = 3y - 30; multiplied what's inside the bracket
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y + 2 + 30 = 3y; add 30 to both sides
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32 = 3y - y; subtract y from both sides
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y =
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y = 16 yrs; his age now
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Try this in the original statement, see if works
"In two years time Geoff will be three times as old as he was ten years ago."
16 + 2 = 3(16 - 10)
18 = 3(6)
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You don't need brackets around the problem
