1)    9х=405

х=45

2) 23х=529

х=23

 3) 9х - 135=72

9х=207

х=23

4)48х-128=448

48х=576

х=12

 5)336+24х=816

24х=816-336

24х=480

х=20

 6) 5х+24=13*8

5х=104-24

5х=80

х=16

 7) 48=8(х+4)

48=8х+32

8х=48-32

8х=16

х=2

 8) 16х=256+48

16х=304

х=19

 9)48/х=8-4

48/х=4

4х=48

х=12

 10)16x+x-7x+27=217
16x+x-7x = 217-27
10x = 190
x = 19

1) 5х+4х=405

9x = 405

x = 45

2) 24х-х=529

23x = 529

x = 23

3) 9(х-15)=72

9x-135 = 72

9x = 72+135

9x = 207

x = 23

4) (3х-8)16=448

48x-128 = 448

48x = 448+128

48x = 576

x = 12

5) 24(14+х)=816

336+24x = 816

24x = 816-336

24x = 480

x = 20

6) (5х+24):8=13

5x+24 = 13*8

5x+24 = 104

5x = 104-24

5x = 80

x = 16

7) 48:(х+4)=8

x+4 = 48:8

x+4 = 6

x = 2

8) 12х+4х-48=256

12x+4x = 256+48

16x = 304

x = 19

9) 48:х+4=8

48:x = 12

x = 4

10) 16x+x-7x+27=217

16x+x-7x = 217-27

10x = 190

x = 19