Question 1201056
c small weight
g large weight


COMBINED WEIGHT 1 and 1
{{{c+g=90}}}


TRUCK IS CARRYING
65 large and 70 small boxs, 6000 pounds.
{{{65g+70c=6000}}}{{{whcih_is_simplifiable}}}.



SYSTEM OF EQUATIONS
{{{system(c+g=90,13g+14c=1200)}}}-------very simple to solve



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If multiply "90" equation by 13, then
{{{system(13c+13g=1170,14c+13g=1200)}}}
add the negative of equation 1 to equation 2;
{{{highlight(c=30)}}}
which means that {{{highlight(g=60)}}} .