Question 933342
Let X be the amount of 1% cream.
Let Y be the amount of 10% cream.
1.{{{X+Y=60}}}
.
.
{{{1(X)+10(Y)=3(60)}}}
2.{{{X+10Y=180}}}
Subtract eq. 1 from eq. 2,
{{{X+10Y-X-Y=180-60}}}
{{{9Y=120}}}
{{{Y=40/3}}}
Then,
{{{X+40/3=60}}}
{{{X=180/3-40/3}}}
{{{X=140/3}}}