Brad Walked to the shore. There he saw 4 rocks lying side to side. Resting on the rocks were crabs. each rock had 2 more crabs than the rock to its left. There were 56 crabs in all. From left to right, how many crabs were on each rock
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Let x = the number of crabs on the left most rock
x + x+2 + x + 4 + x + 6 = 56
4x + 12 = 56
4x = 44
x = 11
therefore there are
11 crabs on the 1st rock
13 crabs on the 2nd rock
15 crabs on the 3rd rock
17 crabs on the 4th rock
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