Question 1170238
{{{system(b+x+f=155,b=x+f+5,f+5=2(x-5))}}}


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{{{system(b-x-f=5,f+5=2x-10)}}}


{{{system(b-x-f=5,f-2x=-15)}}}


{{{system(b-x-f=5,f=2x-15)}}}


{{{b-x-2x+15=5}}}
{{{b-3x=-10}}}
{{{b=3x-10}}}

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revise original system

{{{system(3x-10+x+f=155,3x-10=x+f+5,f+5=2x-10)}}}

{{{system(4x+f=165,2x-f=15)}}}

{{{(4x+f)+(2x-f)=165+15}}}

{{{6x=180}}}

{{{highlight(x=30)}}}-----------Sue had,
and you can find the other two values.