If x and y are positive, is 3x > 7y?
(1) x > y + 4
(2) -5x < -14y
Statement (1) ALONE is sufficient, but statement (2) alone is not sufficient.
Statement (2) ALONE is sufficient, but statement (1) alone is not sufficient.
BOTH statements TOGETHER are sufficient, but NEITHER statement ALONE is sufficient.
EACH statement ALONE is sufficient.
Statements (1) and (2) TOGETHER are NOT sufficient.
审题!x和y是正整数
X和y是正数,没说是整数、
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