Question

10-5x=3 42-2x=16 2.5x=10 211/x=31 x*77=0 2x/3=8

Answer 1

10-5х=3
-5х=3-10
-5х=-7
Х=5/7

42-2х=16
-2х=16-42
-2х=-26
Х=-26:-2
Х=13

2.5х=10
2.5х : 2.5=10:2,5
Х=4

211/х=31 х≠0
211=31х
Х=211/31

Х*77=0
Х=0

2х/3=8
3/2*2х/3=3/2*8
Сокращаем
Х=3*4
Х=12

Answer 2

It looks like you've provided a set of equations. Let's solve each one step by step:

1. 10 - 5x = 3

First, let's isolate the variable x:

10 - 3 = 5x

7 = 5x

Now, divide both sides by 5:

7/5 = x

So, x = 7/5 or x = 1.4

2. 42 - 2x = 16

Subtract 16 from both sides:

42 - 16 = 2x

26 = 2x

Now, divide both sides by 2:

26/2 = x

13 = x

So, x = 13

3. 2.5x = 10

Divide both sides by 2.5 to isolate x:

(2.5x)/2.5 = 10/2.5

x = 4

So, x = 4

4. 211/x = 31

Multiply both sides by x to isolate x in the denominator:

211 = 31x

Now, divide both sides by 31:

211/31 = x

x ≈ 6.81 (rounded to two decimal places)

5. x * 77 = 0

To solve for x, divide both sides by 77:

x * 77 / 77 = 0 / 77

x = 0

So, x = 0

6. 2x/3 = 8

Multiply both sides by 3 to isolate x:

2x = 8 * 3

2x = 24

Now, divide both sides by 2:

(2x)/2 = 24/2

x = 12

So, x = 12

These are the solutions for each of the given equations.