Question 176788
lets call time for storm 1 and storm 2 {{{t[1]}}}and {{{t[2]}}} respectively
:
{{{t[1]+t[2]=50}}}.....eq 1
{{{15t[1]+35t[2]=1450}}}..eq 2
:
take eq 1 and re write to {{{t[1]=50-t[2]}}}
:
{{{15(50-t[2])+35t[2]=1450}}}
:
{{{750-15t[2]+35t[2]=1450}}}
:
{{{20t[2]=700}}}
:
{{{highlight(t[2]=35)}}}hours
:
{{{t[1]=50-t[2]=50-35=highlight(15)}}}hours