Question

1) -2(5-3х)=7х+3 2) 10х+9=7х 3) 2х+2=-3 4) х+7-(х/3)=3 5) х-(х/12)=(55/12)

Answer 1

Ответ:

Объяснение:1) -10+6х=7х+3

6х-7х=3+10

-х=13

х=-13

2)10х-7х=-9

3х=-9

х=-3

3)2х=-3-2

2х=-5

х=-2.5

4)х+7-(х/3)=3

х+4-(х/3)=0 Приводим к общему знаменателю..

(3х+12-х)/3=0

2х+12=0

2х=-12

х=-6

5)х-(х/12)=(55/12)

х-(х/12)-(55/12)=0

(12х-х-55)/12=0

11х-55=0

11х=55

х=5

Answer 2

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

1. -2(5-3x) = 7x + 3

Expand the left side: -10 + 6x = 7x + 3

Move the variables to one side and the constants to the other side: 6x - 7x = 3 + 10 -x = 13

Divide by -1 to solve for x: x = -13

2. 10x + 9 = 7x

Move the variables to one side and the constants to the other side: 10x - 7x = -9 3x = -9

Divide by 3 to solve for x: x = -3

3. 2x + 2 = -3

Move the constant to the other side: 2x = -3 - 2 2x = -5

Divide by 2 to solve for x: x = -5/2

4. x + 7 - (x/3) = 3

Combine like terms: x - (x/3) = 3 - 7 x - x/3 = -4

To simplify the left side, find a common denominator, which is 3: (3x - x)/3 = -4 (2x)/3 = -4

Multiply both sides by 3 to solve for x: 2x = -12

Divide by 2 to get the value of x: x = -6

5. x - (x/12) = 55/12

To simplify the left side, find a common denominator, which is 12: (12x - x)/12 = 55/12 (11x)/12 = 55/12

Multiply both sides by 12 to solve for x: 11x = 55

Divide by 11 to get the value of x: x = 5

So, the solutions to the given equations are:

1. x = -13
2. x = -3
3. x = -5/2
4. x = -6
5. x = 5