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Anonymous
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8x=7x-7 x=-7
8x+7=55 8x=55-7 8x=48 x=48/8 x=6
x=7 and y=4
8x+7=55 8x=55-7 [subtract 7 from both sides] 8x=48 x=48/8 [divide both sides by 8] x=6
7/8x = 21 7 = 21*8x 168x = 7 x = 7/168 = 1/24