Question 925175: [4 years ago Shak was 5 times as old as his younger brother John. If John will be half as old as Shak in 2 years, how old is John?] Answer by TimothyLamb(4379) (Show Source):
You can put this solution on YOUR website! x = john age now
y = shak age now
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y - 4 = 5(x - 4)
y + 2 = 2(x + 2)
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y - 4 = 5x - 20
y + 2 = 2x + 4
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5x - y = 16
2x - y = -2
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put the system of linear equations into standard form
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5x - y = 16
2x - y = -2
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solution:
x = john age now = 6
y = shak age now = 14
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