Question

3х - 6 =4х 6х-21=93х-4+2х=6+2х 5х+15=104-2у=у-550-7у-16=3у-18

Answer 1

3х - 6 =4х  

4x - 3x = -6

x = -6

6х-21=9

6x = 9 + 21

6x = 30

x = 30 : 6

x = 5

3х-4+2х=6+2х  

5x - 4 = 6 + 2x

5x - 2x = 6 + 4

3x = 10

x = 10 : 3

x = 3 1/3

5х+15=10

5x = 10 - 15

5x = -5

x = -5 : 5

x = -1

4-2у=у-5

y + 2y = 5 + 4

3y = 9

y = 9 : 3

y = 3

50-7у-16=3у-18

34 - 7y = 3y - 18

3y + 7y = 34 + 18

10y = 52

y = 52 : 10

y = 5,2

Answer 2

To solve these equations, let's take them one by one:

1. 3x - 6 = 4x Subtract 3x from both sides: 3x - 3x - 6 = 4x - 3x -6 = x

2. 6x - 21 = 9x Subtract 6x from both sides: 6x - 6x - 21 = 9x - 6x -21 = 3x Divide by 3: x = -7

3. 93x - 4 + 2x = 6 + 2x Subtract 2x from both sides: 93x - 2x - 4 = 6 Combine like terms: 91x - 4 = 6 Add 4 to both sides: 91x - 4 + 4 = 6 + 4 91x = 10 Divide by 91: x = 10 / 91

4. 5x + 15 = 104 Subtract 15 from both sides: 5x + 15 - 15 = 104 - 15 5x = 89 Divide by 5: x = 89 / 5

5. -2y = y - 550 Add 2y to both sides: -2y + 2y = y + 2y - 550 0 = 3y - 550 Add 550 to both sides: 550 = 3y Divide by 3: y = 550 / 3

6. -7y - 16 = 3y - 18 Add 7y to both sides: -7y + 7y - 16 = 3y + 7y - 18 -16 = 10y - 18 Add 18 to both sides: -16 + 18 = 10y - 18 + 18 2 = 10y Divide by 10: y = 2 / 10 y = 1/5

So the solutions are:

1. x = -6
2. x = -7
3. x = 10/91
4. x = 89/5
5. y = 550/3
6. y = 1/5