Question 637162
  <pre><font face = "Tohoma" size = 3 color = "indigo"><b> 
Hi,
{{{(1/2)y + 6 = 2y + 21}}}   |Multiplying thru by 2 so as all denominators = 1
    y + 12  = 4y + 42
       -30 = 3y
       -10 = y
and...
 {{{-5 + 6 = 1 = -20+21}}}