Question 743109
{{{x(159)+y(3.3)=1000}}}....eq.1 and 

{{{x(2.3)+y(0.3)=18}}}....eq.2
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start with
{{{x(2.3)+y(0.3)=18}}}....eq.2 and solve for {{{y}}}

{{{y(0.3)=18-x(2.3)}}}

{{{y=18/(0.3)-x(2.3)/(0.3)}}}

{{{y=60-x(7.7)}}}  substitute it in eq.1


{{{x(159)+(60-x(7.7))(3.3)=1000}}}....eq.1 solve for {{{x}}}

{{{x(159)-x(25.3)+198=1000}}}

{{{x(159-25.3)+198=1000}}}

{{{x(133.7)=1000-198}}}

{{{x=802/133.7}}}

{{{x=5.99}}}...round it

{{{x=6}}}

now find {{{y}}}

{{{y=60-x(7.7)}}}

{{{y=60-5.99(7.7)}}}

{{{y=60-46.123}}}

{{{y=13.9}}}