Question

prosze o jak najszybsza odpowiedz

Answer 1

zad.10

a ) 2 • ( x + 4 ) + 6x = 8

2x + 8 + 6x = 8

x = 0

b) 5x - 2( x + 4 ) = 10

5x - 2x - 8 = 10

3x - 8 = 10

3x = 18

x = 6

c ) -4 + 4 ( 2 - 5x ) = 9

- 4 + 8 - 20x = 9

4 - 20x = 9

-20x = 5

x = 0,25

zad. 11

a ) x + 3 = 2 • x

x = 3

b) x • 3 = 16 + x

x = 8

c) x • 4 - 20 = 8

x = 7

zad.12

a )

b = 2x + 1

a = x + 5

h = x

Ob = a • h / 2

Ob = 30

a × h = 60

b )

a = x + 4

Ob = a • h / 2

Ob = 30

a • h = 60

No w 12 tylko tyle mogę pomóc :(( , ale reszta będzie dobrze.