Question

2) 67 - 21y = 25; 4) 83 + 29x = 982. - 2) (63 − y) + 109 = 121; 4) 103 - (z + 47) = 54. 2) 122 + (y - 7) = 200; 4) 53 - (y - 13) = 24. 2) (200 + x) : 12 = 32; 4) 729: (c - 15) = 81; 6) 12 (97 - 2) = 240.​

Answer 1

Ответ:

1. 67-21у=25

21у=67-25

у=42:21

у=2

2. 83+29х = 982

29х=982-83

х=899:2

х=31

3. (63-у)+109=121

63-у=121-109

у=63-12

у=51

4. 103-(z+47)=54

z+47=103-54

z=49-47

z=2

5. 122+(y-7)=200

y-7=200-122

y=78+7

y=85

6. 53-(y-13)=24

y-13=53-24

y=29+13

y=42

8. 729:(c-15)=81

c-15=729:81

c=9+15

c=24

Пошаговое объяснение:

(200+x):12=32 не решается, ответ будет в -.

12 (97 - 2) = 240, не хватает значения(x,y,z и др.), и нет знака

Answer 2

It seems like you have a set of equations that you'd like to solve. Let's go through each of them one by one:

1. 67 - 21y = 25

First, isolate the variable y: 67 - 25 = 21y 42 = 21y

Now, divide both sides by 21: y = 42 / 21 y = 2

So, the solution is y = 2.

2. (63 - y) + 109 = 121

First, simplify the equation by combining like terms on the left side: 63 - y + 109 = 121

Combine 63 and 109: 172 - y = 121

Now, isolate the variable y: -y = 121 - 172 -y = -51

To get rid of the negative sign, multiply both sides by -1: y = 51

So, the solution is y = 51.

3. 122 + (y - 7) = 200

First, simplify the equation by expanding the expression inside the parentheses: 122 + y - 7 = 200

Combine the constants on the left side: 115 + y = 200

Now, isolate the variable y: y = 200 - 115 y = 85

So, the solution is y = 85.

4. (200 + x) / 12 = 32

To solve for x, multiply both sides by 12: 200 + x = 32 * 12 200 + x = 384

Now, isolate the variable x: x = 384 - 200 x = 184

So, the solution is x = 184.

5. 103 - (z + 47) = 54

First, simplify the equation by removing the parentheses: 103 - z - 47 = 54

Combine constants on the left side: 56 - z = 54

Now, isolate the variable z: -z = 54 - 56 -z = -2

To get rid of the negative sign, multiply both sides by -1: z = 2

So, the solution is z = 2.

6. 729 / (c - 15) = 81

To solve for c, multiply both sides by (c - 15): 729 = 81(c - 15)

Now, divide both sides by 81: 9 = c - 15

Add 15 to both sides to isolate c: c = 9 + 15 c = 24

So, the solution is c = 24.

7. 12(97 - 2) = 240

First, simplify the expression inside the parentheses: 12(95) = 240

Now, multiply 12 by 95: 12 * 95 = 1140

So, the solution is 1140.