Question

2(5-3х)=7х+3 10(х-9)=7 3(5х-3)=-11х+17

Answer 1

Ответ:

1)

$2(5 - 3x) = 7x + 3$

$10 - 6x = 7x + 3$

$- 6x - 7x = 3 - 10$

$- 13x = - 7$

$x = \frac{7}{13}$

2)

$10(x - 9) = 7$

$10x - 90 = 7$

$10x = 97$

$x = \frac{97}{10} = 9.7$

3)

$3(5x - 3) = - 11x + 17$

$15x - 9 = - 11x + 17$

$15x + 11x = 17 + 9$

$26x = 26$

$x = 1$

Answer 2

2(5-3х)=7х+3

10-6х=7х+3

-6х-7х=3-10

-13х=-7

х=7/13

10(х-9)=7

10х-90=7

10х=7+90

10х=97

х=97/10

3(5х-3)=-11х+17

15х-9=-11х+17

15х+11х=17+9

26х=26

х=1

Answer 3

To solve these equations, we'll go through each one step by step:

Equation 1: 2(5 - 3x) = 7x + 3

First, distribute the 2 on the left side: 10 - 6x = 7x + 3

Add 6x to both sides: 10 = 13x + 3

Subtract 3 from both sides: 7 = 13x

Divide both sides by 13: x = 7/13

So, the solution for the first equation is x = 7/13.

Equation 2: 10(x - 9) = 7

Distribute the 10 on the left side: 10x - 90 = 7

Add 90 to both sides: 10x = 97

Divide both sides by 10: x = 97/10

So, the solution for the second equation is x = 97/10.

Equation 3: 3(5x - 3) = -11x + 17

Distribute the 3 on the left side: 15x - 9 = -11x + 17

Add 11x to both sides: 26x - 9 = 17

Add 9 to both sides: 26x = 26

Divide both sides by 26: x = 1

So, the solution for the third equation is x = 1.

To recap:

1. For the first equation, x = 7/13.
2. For the second equation, x = 97/10.
3. For the third equation, x = 1.