7*1/2-6b=8
3,5-6b = 8
-6b=8-3,5
-6b=4,5 /:(-6)
b= -0,75
7 * 1/2 - 6b = 8
7/2 - 6b = 8
-6b = 8 - 7/2
-6b = 8/1 - 7/2
-6b= 16/2 - 7/2
-6b = 4,5 |: (-6)
b = - 0,75 lub w ułamku zwykły b = - 3/4
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3,5-6b = 8
-6b=8-3,5
-6b=4,5 /:(-6)
b= -0,75
7 * 1/2 - 6b = 8
7/2 - 6b = 8
-6b = 8 - 7/2
-6b = 8/1 - 7/2
-6b= 16/2 - 7/2
-6b = 4,5 |: (-6)
b = - 0,75 lub w ułamku zwykły b = - 3/4