Question 667967
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Hi,
Re TY
'combining' the d terms requires -2d to be added to both sides
2d+6=3(d-3)
 2d + 6 = 3d - 9    ||Adding 9 and -2d to both sides of the EQ
     15 = d
and..
{{{2*15+6 = 36 = 3(15-3)}}}