Question

1)⅞Х=2,1 2)-6х=23)13х-10=7х+24)7-15(х-2)=23-14х​

Answer 1

1.

$x = 2.1 \div \frac{7}{8} = 2.1 \times \frac{8}{7} = 0.3 \times 8 = 2.4$

2.

х=2÷-6=-1/3

3.

13х-10=7х+2

6х=12

х=2

4.

7-15х+30=23-14х

37-23=х

х=14

Answer 2

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

1. ⅞x = 2.1 To solve for x, you can divide both sides of the equation by ⅞: x = 2.1 / ⅞ x ≈ 2.4

2. -6x = 2 To solve for x, divide both sides of the equation by -6: x = 2 / -6 x = -1/3

3. 13x - 10 = 7x + 2 First, we can simplify the equation by moving the 7x to the left side of the equation by subtracting it from both sides: 13x - 7x - 10 = 2

Now, combine like terms on the left side: 6x - 10 = 2

Next, add 10 to both sides to isolate the x term: 6x - 10 + 10 = 2 + 10 6x = 12

Now, divide both sides by 6 to find x: x = 12 / 6 x = 2

4. 7 - 15(x - 2) = 23 - 14x First, distribute the -15 on the left side of the equation: 7 - 15x + 30 = 23 - 14x

Now, combine like terms on both sides: -15x + 37 = -14x + 23

To isolate the x terms on one side, subtract -14x from both sides: -15x + 14x + 37 = 23

Simplify: -x + 37 = 23

Now, subtract 37 from both sides to isolate the x term: -x + 37 - 37 = 23 - 37 -x = -14

Finally, multiply both sides by -1 to solve for x: x = 14

So, the solutions to the equations are:

1. x ≈ 2.4
2. x = -1/3
3. x = 2
4. x = 14