Question 943545

{{{y = 0.08x}}}.........eq.1
{{{y = 100 + 0.04x}}}.........eq.2
------------------

{{{y = 100 + 0.04x}}}.........eq.2 substitute {{{ 0.08x}}} for {{{y }}}

{{{ 0.08x = 100 + 0.04x}}}....solve for {{{x}}}

{{{ 0.08x -0.04x= 100 }}}

{{{ 0.04x= 100 }}}....multiply both sides by {{{100}}}

{{{ 4x= 10000 }}}

{{{ x= 10000/4 }}}

{{{ highlight(x= 2500)}}}

go to {{{y = 0.08x}}}.........eq.1 substitute {{{ 2500}}} for {{{x }}} and solve for {{{y}}}

{{{y = 0.08*2500}}}

{{{highlight(y = 200)}}}