Question

Oblicz:

25a-5*5a*5*1=

42-4b=
1,4a-7=
0,6a+0,6=
22b+6=

0,9b+12=
1/3-1/3a=
2 3/5 a + 2 2/5=
1/6 b + 5/6=
2,5a + 0,5b=

/ = kreska ułamkowa

Daje naj!!! :)

Answer 1

25a -5 *5a * 5 *1 =

25a - 125a = -100a

 

 

42 - 4b

- 4b = -42 /:(-4)

b = 10i2/4

b = 10 i1/2

 

1,4a -7

1,4a = 7 /:1,4

a = 5

 

 

0,6a + 0,6

0,6a = -0,6 /:0,6

a = -1

 

22b +6

22b = -6/22

b = -3/11

 

0,9b +12

0,9b = -12 /:0,9

b = -13,(3)

 

1/3 -1/3a

-1/3a = -1/3 /:(-1/3)

  a = 1

 

2i3/5a + 2i2/5

13/5a = - 12/5 /:13/5

a = -12/5 * 5/13

a = -12/1 * 1/13

a = -12/13

 

1/6b + 5/6

1/6b = -5/6 / *6

  b = -5

 

 

2,5a + 0,5b = 2,5a +0,5b