Question

-8y=5

-3/4-1/4l =2,25

6b-3 =-9

-3(y/3 + 1) -2 = 4 ( 1 - y )

takie cos / oznacza ulamek

POMOCY

Answer 1

-8y=5  /-5

-8y-5=0  /+5

-8y=5  / : -8

y=5/(-8)

y= - 5/8

 

-3/4-1/4l=2,25 po uproszczeniu:

-1/4l -3/4=2,25  /-2,25

-1/4l -3/4-2,25=0

-1/4l-3=0  /+3

-1/4l=3  / : - 1/4

l=3/ (- 1/4)

l= -12

 

6b-3 =-9  /+9

6b-3+9=0

6b+6=0  /-6

6b= -6  /:6

b= -6/6

b= -1

 

-3(y/3 + 1) -2 = 4 ( 1 - y )  /-4(1-y)

-3(y/3+1)-4(1-y)-2=0

-3(1/3y+1)-1*4(1-y)-2=0

3y-7-2=0

3y-9=0  /+9

3y=9  /:3

y= 9/3

y=3