Question

МАтем 435 помагите пж пж

Answer 1

Ответ:

1) 1/4 + y =3/7

y= 3/7 - 1/4

y= 12-7 / 28

y=5/28

1/4 + 5/28 =3/7

3/7 = 3/7

2) y - 5/12 =3/10

y= 3/10 + 5/12

y= 18+25 /60

y=43/60

43/60 - 5/12 = 3/10

3/10=3/10

3) y+4/11=3/5

y=3/5 - 4/11

y=33-20/55

y= 13/55

13/55 + 4/11=3/5

3/5=3/5

4) 4/15+y=11/25

y= 11/25 - 4/15

y= 33-20/75

y= 13/75

4/15 + 13/75=11/25

11/25=11/25