Question

2 (x - 5) = 9;1 - 5 (2-3x) = 6; 2x - (7 + x) = 2;​

Answer 1

Ответ:

2x-10=9

2x=9+10

2x=19

x=9.5

Answer 2

Let's solve each equation step by step:

1. 2(x - 5) = 9

Expand the brackets:

2x - 10 = 9

Add 10 to both sides:

2x = 19

Divide both sides by 2:

x = 9.5

Therefore, the solution to the first equation is x = 9.5.

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

Simplify inside the brackets:

1 - 5(2 - 3x) = 6 1 - 10 + 15x = 6 -9 + 15x = 6

Add 9 to both sides:

15x = 15

Divide both sides by 15:

x = 1

Thus, the solution to the second equation is x = 1.

3. 2x - (7 + x) = 2

Distribute the negative sign:

2x - 7 - x = 2

Combine like terms:

x - 7 = 2

Add 7 to both sides:

x = 9

Hence, the solution to the third equation is x = 9.

To summarize, the solutions to the given equations are:

Equation 1: x = 9.5 Equation 2: x = 1 Equation 3: x = 9