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现在参加这个测试
Subtracting Expressions
(13x - 9y) - (4x + 10y)
(12x + 3y) - (6x + 2y - 4)
(m + 3n) - (5m + 7n)
(8a - 6b - 3) - (-2a + 4b + 7)
What is the perimeter of the figure?
参加了这次测试的学生也参加了 :
Greatest common factor - algebra
Multiplying and dividing expressions
Adding expressions
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