помогите решить уравнения. Created by ashrah. matematika-ru

помогите решить уравнения...

konstantinstar1 1) 630 : 21x + 53 = 68
    630 : 21x = 15
    21x = 630 : 15
    21x = 42
      x = 2
2) 988 : (7x - 18) = 26
     7x - 18 = 988 : 26
     7x - 18 = 38
     7x = 56
        x = 8
3) 2472 : (15 - x :48) = 206
     15 - x : 48 = 2472 : 206
      15 - x : 48 = 12
       - x : 48 = - 3
          x : 48 = 3
          x = 48 * 3 = 144

2 votes Thanks 2

Universalka

Verified answer

630:21х+53=68
630:21х=68-53
630:21х=15
21х=630:15
21х=42
х=42:21
х=2

988:(7х-18)=26
7х-18=988:26
7х-18=38
7х=38+18
7х=56
х=56:7
х=8

2472:(15-х:48)=206
15-х:48=2472:206
15-х:48=12
х:48=15-12
х:48=3
х=3*48
х=144

1 votes Thanks 1

Answers & Comments

Verified answer

pomogite reshit zadachu dlya perevozki 55 tonn zerna vydelili 3 mashinygruzopodyo

рекомендуемые вопросы

Helpful Links

Helpful Social