Question 23212
First let's change the decimals to fractions:
{{{y= (1/2)x - 1/2 }}}


Multiply both sides by the LCD, which is 2 to clear the fractions:
{{{2y = x -1}}}


The tradition in standard form is to keep the x coefficient positive, so let's keep the x on the right side and move the 2y to the right by subtracting 2y from each side:
{{{2y - 2y = x - 2y -1}}}
{{{0 = x - 2y - 1}}}


Now, add +1 to each side:

{{{1 = x-2y }}} or {{{x-2y=1}}}


R^2 at SCC