A triangular garden is being formed with stones. The three sides measure 4 meters by 6 meters by 7 meters. Which of the followin
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5a + ( -5 ) - 3a + 10b - 3 - b
( 5a - 3a ) + ( -5 - 3 ) + ( 10b - b )
2a + ( -8 ) + 9b
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