Question

Rozwiaz Rownanie

G) a+3/5=5/7

h) x-2/3=2x+7/5

i) 5/2m+5=2/4m-1

Answer 1

a+3/5=5/7

a=5/7-3/5

a=25/35-21/35

a=4/35

 

x-2/3=2x+7/5

x-2x=7/5+2/3

-x=21/15+10/15

-x=31/15/:(-1)

x=-2 1/15

 

5/2m+5=2/4m-1

5/2m-2/4m=-1-5

10/4m-2/4m=-6

8/4m=-6

2m=-6/:2

m=-3

Answer 2

G)  

a+3/5=5/7   /* 35

35a + 21 = 25

35a = 25-21

35a = 4    /:35

a = 4/35

 

h)

x-2/3=2x+7/5    /* 15

15x -10 = 30x + 21

15x – 30x = 21 +10

-15x = 31    /(-15)

x = -31/15

x = -2 i 1/15

 

 

i)

 5/2m+5=2/4m-1

5(4m-1) = 2 (2m+5)

20m – 5 = 4m +10

20m -4m = 10 + 5

16m = 15    /:16

m = 15/16