Question 933481
Let A be the amount of 100% and B be the amount of 20%.
1.{{{A+B=60}}}
.
.

{{{100A+20B=60(A+B)=60(60)=3600}}}
2.{{{5A+B=180}}}
Subtract eq. 1 from eq. 2,
{{{5A+B-A-B=180-60}}}
{{{4A=120}}}
{{{A=30}}}
Then,
{{{30+B=60}}}
{{{B=30}}}