Question 967876
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x and y are the two numbers.
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{{{x+y=21}}}
{{{x=21-y}}} Use this to substitute for x below.
{{{x=(1/2)y+3}}} Substitute for x from above.
{{{21-y=(1/2)y+3}}} Add y to each side.
{{{21=1.5y+3}}} Subtract 3 from each side.
{{{18=1.5y}}} Divide each side by 1.5.
{{{12=y}}} ANSWER 1: The larger number is 12.
{{{x=21-y}}}={{{21-12=9}}} ANSWER 2: The smaller number is 9.