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7b+8+6=15
99-k=555+96k
7b=15 -8-6
7b= 1 |:7
b= 1/7
-k - 96k = 555 - 99
-97k = 456 |: (-97)
7b + 8+ 6 = 157b=15-8-6
7b=1 /:7
b=1/7
-k-96k=555-99
-97k= 456 /: (-97)
k= -456/97
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7b=15 -8-6
7b= 1 |:7
b= 1/7
-k - 96k = 555 - 99
-97k = 456 |: (-97)
7b + 8+ 6 = 15
7b=15-8-6
7b=1 /:7
b=1/7
99-k=555+96k
-k-96k=555-99
-97k= 456 /: (-97)
k= -456/97