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Mathematics 22 Online
OpenStudy (anonymous):

x+9-(x-7)

OpenStudy (zzr0ck3r):

distribute the - to (x-7) x+9-x+7 = ?

OpenStudy (anonymous):

how can you distribute the - to (x-7)

OpenStudy (cwrw238):

think about it as -1(x - 7) - distribute the -1 over( x- 7)

OpenStudy (zzr0ck3r):

-(a-b) = -(a) - (-b) = -a+b

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