the present ages of three persons proportion 4:7:9 eight years ago the sum of their ages was56 find their present ages in years
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let them be 4x, 7x, 9x.
4x+7x+9x=56
20x=56
x=56/20
x=2.8
4x=4x2.8=11.2
7x=7x2.8=19.6
9x=9x2.8=25.2
all answers should be converted into years
4x+7x+9x=56
20x=56
x=56/20
x=2.8
4x=4x2.8=11.2
7x=7x2.8=19.6
9x=9x2.8=25.2
all answers should be converted into years
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