Rozwiąż równania -7b = 7/8 2-x = 5 -2x 69-x = x +96 1/2c + 5 = c+8 znak / oznacza kreskę ułamkową
a)
-7b = 7/8 /:(-7)
b = 7/8 : (-7/1) = 7/8 * (-1/7) = -7/56
b = - 1/8 lub - 0,125
b)
2-x = 5 -2x
x = 3
c)
69-x = x+96
-2x = 27 /:(-2)
x = -13,5
d)
1/2c + 5 = c+8
0,5c - c = 8 - 5
-0,5c = 3 /:(-0,5)
c = -6
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a)
-7b = 7/8 /:(-7)
b = 7/8 : (-7/1) = 7/8 * (-1/7) = -7/56
b = - 1/8 lub - 0,125
b)
2-x = 5 -2x
x = 3
c)
69-x = x+96
-2x = 27 /:(-2)
x = -13,5
d)
1/2c + 5 = c+8
0,5c - c = 8 - 5
-0,5c = 3 /:(-0,5)
c = -6