Question 1023917
Account for time, totaling to 1 hour.


x, some amount of time, the second half of the examination.


{{{(2/3)x+x=1}}}, the two time portions, one for each half of the examination, were 1 hour.


Since question is how many minutes, remake the equation like this, for 60 MINUTES instead of as 1 hour:
{{{(2/3)x+x=60}}}, to account for MINUTES.


{{{(5/3)x=60}}}


{{{x-(3/5)60}}}


{{{highlight(x=36)}}}, minutes for second half of the exam.





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Looking back from 
{{{(2/3)x+x=60}}}

Factorize to
{{{(2/3+1)x=60}}}


Basic fractions skills
{{{(2/3+3/3)x=60}}}


{{{(5/3)x=60}}}


{{{(3/5)(5/3)x=(3/5)60}}}


{{{x=(3/5)60}}}