Question 1173861
{{{system(5n+10d+25q=770,n+d+q=45,n+d=q-3)}}}



Look at the last two equations.
{{{system((n+d)+q=45,n+d=q-3)}}};


{{{q-3+q=45}}}

{{{2q=48}}}

{{{highlight(q=24)}}}---------------the quarters


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{{{system(n+2d+5*24=154,n+d=21)}}}


{{{system(n+2d=154-120,n+d=21)}}}


{{{system(n+2d=34,n+d=21)}}}
{{{Eq-E2}}}:
{{{highlight(d=13)}}}


and you can find n.