<span>3x + 2y = 13
2x + 3y = 12</span>
The lowest common multiple of 12 and 27 is 108.
12 x 9 = 108 and
27 x 4 = 108 .
So she has to buy 9 packs of cards ... 108 of them ... and 4 packs of envelopes.
11.45 • 38 + 11.45/4 = $437.97
B since 11+11=22 and 3/7+4/7=1, 22+1=23
