Question 351924
{{{s[1]+s[2]+s[3]=110}}}
.
.
.
{{{s[1]=2*s[2]}}}
{{{s[3]=30+s[2]}}}
Substitute,
{{{2*s[2]+s[2]+30+s[2]=110}}}
{{{4s[2]+30=110}}}
{{{4s[2]=80}}}
{{{highlight( s[2]=20)}}}cm
Then,
{{{s[1]=2*20}}}
{{{highlight( s[1]=40)}}}cm
And,
{{{s[3]=30+20}}}
{{{highlight( s[3]=50)}}}cm