решите уравнение 1.-2x+19=5x-16 2/ 8x-25=3x+20 3/6-y=3(3y-8)

Question

решите уравнение 1.-2x+19=5x-16 2/ 8x-25=3x+20 3/6-y=3(3y-8)

Answer 1

1.

-7х=-35

х=5.

2.

5х=45

х=9

3.6-у=9у-24

-10у=-30

у=3.

Answer 2

1.-2x+19=5x-16

-2х-5x=-16-19

-7x=-35

x=-35/(-7)

x=5

 

2. 8x-25=3x+20

8x-3x=20+25

5x=45

x=9

 

3. 6-y=3(3y-8)

6-y=9y-24

-y-9y=-24-6

-10y=-30

y=3