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Mathematics 15 Online
OpenStudy (happpily):

hii its about combining like terms. 9c - 6d + 4c - 3d

OpenStudy (kobeni-chan):

Add 9c and 4c together to get 13c, which is positive. Add the value of 6d and 3d together to get 9d, but both values were being subtracted. This should make 13c - 9d

OpenStudy (happpily):

ohhhh thank you sosooo much!

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