Question

1) (45-y)+18=0 2)12-(-x+2)=7 3) 10x=5 4)2x-7=-5 5)(6x-2)-3(4-x)=2x-1

Answer 1

Ответ:

(45 - y) + 18 = 0

45 - y = -18

-y = -18-45

-y = -63 | :(-1)

y = 63

Ответ: 63

12 - (-x + 2) = 7

-(-x + 2) = 7 - 12

x - 2 = -5

x = -5 + 2

x = -3

Ответ: -3

10x = 5

x = 5 : 10

x = 0,5

Ответ: 0,5

2x - 7 = -5

2x = -5 + 7

2x = 2 | : 2

x = 1

Ответ: 1

(6x - 2) - 3(4 - x) = 2x - 1

6x - 2 - 12 + 3x = 2x - 1

6x + 3x - 2x = -1 + 2 + 12

7x = 13

x = 1 6/7

Ответ: 1 6/7

Answer 2

Let's solve each of the equations step by step:

1. (45 - y) + 18 = 0

To solve this equation, we'll combine like terms:

45 - y + 18 = 0

Combine the constants:

63 - y = 0

Now, isolate the variable y by moving the constant to the other side of the equation:

-y = -63

Multiply both sides by -1 to solve for y:

y = 63

So the solution to the equation is y = 63.

2. 12 - (-x + 2) = 7

First, simplify the expression within the parentheses:

12 + x - 2 = 7

Combine like terms:

x + 10 = 7

Now, isolate the variable x by moving the constant to the other side of the equation:

x = 7 - 10

x = -3

So the solution to the equation is x = -3.

3. 10x = 5

To solve for x, divide both sides of the equation by 10:

10x/10 = 5/10

x = 0.5

So the solution to the equation is x = 0.5.

4. 2x - 7 = -5

First, isolate the variable x by moving the constant to the other side of the equation:

2x = -5 + 7

2x = 2

Now, divide both sides of the equation by 2 to solve for x:

x = 2/2

x = 1

So the solution to the equation is x = 1.

5. (6x - 2) - 3(4 - x) = 2x - 1

First, distribute the -3 to the terms inside the parentheses:

6x - 2 - 3 * 4 + 3x = 2x - 1

Simplify:

6x - 2 - 12 + 3x = 2x - 1

Combine like terms:

9x - 14 = 2x - 1

Now, isolate the variable x by moving the constant to the other side of the equation:

9x - 2x = -1 + 14

7x = 13

Finally, divide both sides of the equation by 7 to solve for x:

x = 13/7

So the solution to the equation is x = 13/7.