Posted by Lilly on Monday, November 7, 2011 at 5:23pm.
I find it's usually easiest to get rid of fractions.
9d - d/5 = 88
45d - d = 440
44d = 440
d = 10
check: 90-2 = 88
c/2 + 11c = 92
c + 22c = 184
23c = 184
c = 8
check: 4+88 = 92
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