Question

105. 1) 12* - 60; 2) 33y = 132;8) 512 - 357;4) 2x - 15 = 13;5) 7y - 25 - 45;6) 130 - 4x - 70;7) 49 - 3x - 34:8) 9y - 89 - 55;9) 74 - 82 - 2.​

Answer 1

Ответ:

На первом ты написал "  *  " и я заменил её "  x  " чтобы понятней было

1) 12x - 60 = 0

12x = 60

x = 60 : 12

x = 5

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2) 33y = 132

y = 132 : 33

y = 4

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3) 512 - 357 = 155

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4) 2x - 15 = 13

2x = 13 + 15

2x = 28

x = 28 : 2

x = 14

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5) 7y - 25 - 45 = 0

7y - 25 = 45

7y = 45 + 25

7y = 70

y = 70 : 7

y = 10

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6) 130 - 4x - 70 = 0

130 - 4x = 70

-4x = -130 - 70

-4x = 60

x = 60 : 4

x = 15

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7) 49 - 3x - 34 = 0

49 - 3x = 34

-3x = -49 - 34

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8) 9y - 89 - 55 = 0

9y - 89 = 55

9y = 55 + 89

9y = 144

y = 144 : 9

y = 16

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9) 74 - 82 - 2 = -10

Answer 2

It seems like you've provided a list of mathematical expressions and equations. It looks like there might be some typos or formatting issues in the list, but I'll do my best to interpret and solve each of them:

1. $12* - 60$ doesn't seem to be a complete expression or equation. If you intended $12x - 60$, then you have an algebraic expression that represents a quantity.

2. $33y = 132$ is a linear equation with a variable $y$. To solve for $y$, you would divide both sides of the equation by 33: $y = \frac{132}{33} = 4$.

3. It seems that you might be missing an equation or expression with the number 8.

4. $2x - 15 = 13$ is a linear equation with a variable $x$. To solve for $x$, you would add 15 to both sides and get $2x = 28$, then divide by 2: $x = 14$.

5. $7y - 25 - 45$ is an algebraic expression that represents a quantity.

6. $130 - 4x - 70$ is an algebraic expression that represents a quantity.

7. $49 - 3x - 34$ is an algebraic expression that represents a quantity.

8. $9y - 89 - 55$ is an algebraic expression that represents a quantity.

9. $74 - 82 - 2$ simplifies to $74 - 82 - 2 = -10$.

If you need further clarification or have additional information about any of the expressions, please provide more context or correct any errors in the input.