Question 1009762
{{{ 3x + 2y = 7 }}}
First subtract {{{ 2y }}} from both sides
{{{ 3x = 7 - 2y }}}
Divide both sides by {{{ 3 }}}
{{{ x = ( 7 - 2y ) / 3 }}}
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You can do a quick check by plugging in
random values for {{{ y }}}
{{{ y = -7 }}}
{{{ 3x + 2y = 7 }}}
{{{ 3x + 2*(-7) = 7 }}}
{{{ 3x -14 = 7 }}}
{{{ 3x = 21 }}}
{{{ x = 7 }}}
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{{{ x = ( 7 - 2y ) / 3 }}}
{{{ x = ( 7 - 2*(-7) ) / 3 }}}
{{{ x = ( 7 + 14 ) / 3 }}}
{{{ x = 21/3 }}}
{{{ x = 7 }}}
OK