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Mathematics 9 Online
OpenStudy (anonymous):

8x-(5x+7)=8 x=??

OpenStudy (anonymous):

5

OpenStudy (anonymous):

how do you figure that out?

OpenStudy (anonymous):

let's check! we opened -(5x+7)=-5x-7 since then, 8x-5x-7=8 ---> 3x=8+7---> 3x=15, we get x=5

OpenStudy (anonymous):

aaahhhhhh i see. thank you :D

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