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One number is two times another. The sum of the number is 90 what are the two numbers

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apologiabiology
one number is 2 times another
x=2y

sum is 90
x+y=90

easy
x=2y
sub 2y for x
2y+y=90
3y=90
divide both sides by 3
y=30

sub back
x=2y
x=2(30)
x=60

the numbers are 60 and 30

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