<PRE><B>Question 401387</B>
If {{{x}}} pounds of regular yogurt, then fat (3%) in this yogurt is {{{0.03x}}} pounds
60 pounds of low-fat (1%) yogurt contains {{{0.01*60=0.6}}} pounds of fat.
If will obtain 60 pounds, when mix x pounds of regular yogurt with no-fat yogurt, then no-fat yogurt is {{{(60-x)}}} pounds. Fat in this yogurt is 0 pounds
So have equation 
{{{0.03x+0=0.6}}}
{{{x=0.6/0.03}}}
{{{x=20}}} pounds of 3% yogurt
then no-fat yogurt is {{{(60-x)=(60-20)=40}}} pounds
Answer: 20 pounds of regular yogurt and 40 pounds of no-fat yogurt should be mixed to obtain 60 pounds of low-fat yogurt 
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