Question 993473
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x=age at which Jerry will be 40% mothers age
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0.4(27+x)=x
10.8+0.4x=x
10.8=0.6x
18=x
ANSWER: When Jerry is 18 he will be 40% of his mother's age.
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CHECK:
When Jerry is 18, his mother will be 27+18=45.
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0.40(45)=18
18=18