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X 3 )( x 7
x 3 x 7 12
x 3 )( x 7 )( x 4
x 3 )( x 7 )u003d 21
x 3 x 7 answer
x 3 )( x 7 expand
x 3 x 7 10
x 3 x 7 x 2
x 3 )( x 7 )u003d 0
x 3 )( x 7
x 3 )( x 7 solution
