star021506
star021506
17-05-2019
Mathematics
contestada
7x+(2x+7)=9x+7 show work
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jamairany
jamairany
17-05-2019
it is true 9x=9x
7x+(2x+7)=9x+7
7x+2x+7=9x+7
-7. -7
7x+2x=9x
9x=9x
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