Question 586442
{{{ 4*( x + 7 ) = 7 + x }}}
{{{ 4x + 28 = 7 + x }}}
Subtract {{{x}}} from both sides
{{{ 3x + 28 = 7 }}}
Subtract {{{28}}} from both sides
{{{ 3x = -21 }}}
Divide both sides by {{{3}}}
{{{ x = -7 }}}
check answer:
{{{ 4*( x + 7 ) = 7 + x }}}
{{{ 4*( -7 + 7 ) = 7 + -7 }}}
{{{ 4*0 = 0 }}}
{{{ 0 = 0 }}}
OK