Question

решите уравнения...​

Answer 1

1) -8х=-24

х=-24:(-8)

х=3

2) -3х=6/7

х=6/7:(-3)

х=-2/7

3) 7х-4=х-16

7х-х=4-16

6х=-12

х=-12:6

х=-2

4) 8-0,8х=0

-0,8х=0-8

-0,8х=-8

х=-8:(-0,8)

х=10

5) 48=11-(9х+2)

48=11-9х-2

48-11+2=-9х

39=-9х

х=39:(-9)

х=4,(3)

6) 2х-5=7(3х+4)+5

2х-5=21х+28+5

2х-21х=5+28+5

-19х=38

х=38:(-19)

х=-2

7) 9-(8х-11)=-12

9-8х+11=-12

9+11+12=8х

32=8х

х=32:8

х=4

8) 4(2х-5)-х=3х+8

8х-20-х=3х+8

8х-х-3х=20+8

4х=28

х=28:4

х=7