Question 54509
Let x be the number
{{{(3/4)*x = 21}}}
multiply both sides by 4
{{{3x = 84}}}
divide both sides by 3
{{{x = 28}}}
check by putting the answer back into the equation
{{{(3/4)*28 = 21}}}
{{{3*28 = 4*21}}}
{{{84 = 84}}}
OK