Question 1115304
"Use a table"
?
Why?  Is it necessary?



This is a system transcribed literally from the description:
{{{system(f+b=56,f-4=3(b-4))}}}




steps:
{{{f-4=3b-12}}}
{{{f-3b=-12+4}}}
{{{f-3b=-8}}}


-
{{{system(f+b=56,f-3b=-8)}}}


{{{b-(-3b)=56-(-8)}}}

{{{4b=64}}}

{{{highlight(b=16)}}}
-
{{{highlight(f=40)}}}







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