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Zadanie 10 pls na dzisiaj

Zadanie 10 Pls Na Dzisiaj class=

Odpowiedź :

Odpowiedź:

a)

1/3x - 2 = x + 2

1/3x - x = 2 + 2

-2/3x = 4    /*(-3/2)

x = -3/2 * 4 = -6

b)

1 - 6/7x = 4/7

-6/7x = 4/7 - 1       /*(-7/6)

x = 3/7 * 7/6 = 1/2

c)

6(1/4x - 2) = 18

3/2x - 12 = 18

3/2x = 18 + 12       /*2/3

x = 30 * 2/3 = 20

d)

x/6 - 1/6 = 1

1/6x = 1/6      /*6

x = 1

e)

-2(2x - 1) = x/3

-4x + 2 = 1/3x

-4x - 1/3x = -2

-4 1/3x = -2

-13/3x = -2       /*(-3/13)

x = 6/13

f)

2/5(3 - x) = -2

6/5 - 2/5x = -2

-2/5x = -2 - 1 1/5    /*(-5/2)

x = 3 1/5 * 5/2 = 16/5 * 5/2 = 8

g)

3/4(2 - 3x) = -6

3/2 - 9/4x = -6

-9/4x = -6 - 1 1/2      /*(-4/9)

x = 7 1/2 * 4/9 = 15/2 * 4/9 = 10/3 = 3 1/3

h)

1/5(x - 3) = 9 - x

1/5x - 3/5 = 9 - x

1/5x + x = 9 + 3/5

1 1/5x = 9 3/5

6/5x = 48/5      /*5/6

x = 48/5 * 5/6 = 8

i)

(0,6 + x)/2 = x + 1

0,3 + 1/2x = x + 1

0,5x - x = 1 - 0,3

-0,5x = 0,7      /:(-0,5)

x = 1,4

Szczegółowe wyjaśnienie: