Question

Решите уравнение (104, 105).
104. 1) x + 23 = 41; 4) X – 61 = 17;
2) 36 + y = 74; 5) 46 - y = 24;
3) 85 + 2 = 97; 6) 53 - 2 = 25;
7) т: 21 = 10;
8) 192 :п= 16;
9) k: 44 = 20.
105. 1) 12x = 60; ;
2) 33y = 132;
3) 512 = 357;
4) 2x – 15 = 13;
5) 7y – 25 = 45;
6) 130 - 4x = 70;
7) 49 - 3x = 34;
8) 9y – 89
- 89 = 55;
9) 74 - 8z = 2.

Answer 1

1)x+23=41

x=41-23

x=18

18+23=41

2)36+y=74

y=74-36

y=38

36+38=74

3)85+x=97

x=97-85

x=12

85+12=97

4)x-61=17

x=17+61

x=78

78-61=17

5)46-y=24

y=46-24

y=22

46-22=24

6)53-z=25

z=53-25

z=28

53-28=25

7)m÷21=10

m=10×21

m=210

210÷21=10

8)192÷n=16

n=192÷16

n=12

192÷12=16

9)k÷44=20

k=44×20

k=880

880÷44=20

№105

1)12x=60

x=60÷12

x=5

2)33y=132

y=132÷33

y=4

3)51z=357

z=357÷51

z=7

4)2x-15=13

2x=15+13

2x=28

x=14

5)7y-25=45

7y=45+25

7y=70

y=10

6)130-4x=70

4x=130+70

4x=200

x=50

7)49-3x=34

-3x=34-49

-3x=-15

x=5

8)9y-89=34

9y=89+34

9y=123

y=41/3

9)74-8z=2

-8z=2-74

-8z=-72

z=9