Question 674281
Subtract like terms.  Terms with x subtract from terms with x and constants from constants.  Step one is distribute the - sign (which is really multiplying by -1) in the second binomial.  In other words, multiply both terms by -1.<P>
(11+4d)-(3-6d) = 11 + 4d -3 +6d  (-1 * 3 = -3 and -1 * -6d = +6d).  Now combine the terms with d and the constants.<P>
11 + 4d -3 +6d = 8 - 10d.
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