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A)-s=15=4s-14
-s-4s=15-14
-5s=1 /:(-5)
s=-1/5
B)8k-19=-8k+19
8k+8k=19+19
16k=38 /:16
k=38/16
k=2 i 6/16
k=2 i 3/8
-s=15=4s-14
-s-4s=15-14
-5s=1/:(-5)
s=-1/5
b)
8k-19=-8k+19
8k+8k=19+19
16k=38/:16
k=38/16
k=2 3/8
-s-4s=-14-15
-5s=-29
s=5,8
B)8k-19=-8k+19
8k+8k=19+19
16k=38
k=2,375