Question

zad 1
Oblicz 5 3/7- 2 i 4/7=
6i 2/5- 5 i 4/5=
zad 2
Rozwiąż równania i sprawdź :
a) 2(x-1)+x=x-3(2-3x)
b)4y+16=36
c) 1/3(3x-2)=6-x
daje naj błagam o pomoc

Answer 1

Zad 1

5 i 3/7- 2i 4/7=4 i 10/7 -2 i 4/7=2 i 6/7

6 i 2/5-5 i 4/5= 5 i 7/5 -5 i 4/5=3/5

Zad 2

A) 2(x - 1) + x = x - 3(2 - 3x)

2x - 2 + x = x - 6 + 9x

3x - 2 = 10x - 6

-7x = -4 I : (-7)

x = 4/7

B) 4y + 16 = 36 / -16

4y = 20 / :4

y = 5

spr. 4y(4*5=20) + 16 = 36

B)

1/3(3x-2)=6-x / *3

3x - 2 = 18 - x / +x

4x - 2 = 18 / +2

4x = 20 / : 4

x = 5

Answer 2

Zad 1

5 i 3/7- 2i 4/7=4 i 10/7 -2 i 4/7=2 i 6/7

6 i 2/5-5 i 4/5= 5 i 7/5 -5 i 4/5=3/5

Zad 2

a 2(x - 1) + x = x - 3(2 - 3x)

2x - 2 + x = x - 6 + 9x

3x - 2 = 10x - 6

-7x = -4 I : (-7)

x = 4/7

b 4y + 16 = 36 / -16

4y = 20 / :4

y = 5

 

c 1/3(3x-2)=6-x / *3

3x - 2 = 18 - x / +x

4x - 2 = 18 / +2

4x = 20 / : 4

x = 5