Let the number of cans of corn she bought be a
Twice the number of corn cans is 2*a = 2a
The 35 cans of peas were 15 more than twice the number of corn cans which means 15+2a = 35
Solving the equation: 2a = 20
a = 20/2 = <<20/2=10>>10 cans of corn
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