Question

1)5x+(3x-7)=9 2)3y-(5-y)=11 3)(7x+1)-(6x+3)=5 4)(8x+11)-13=9x-5 5)-8x=-24 6)50x=5

Answer 1

Ответ:

1. 2

2. 4.

3. 7

4. 3.

5. 3.

Объяснение:

1.

5х+(3х-7)=9

5х+3х-7=9

8х=7+9

8х=16

х= 16:8

х= 2

2.

3у-(5-у)=11

3у-5+у=11

4у=11+5

4у=16

у= 16:4

у= 4.

3.

(7х+1)-(6х+3)=5

7х+1-6х-3= 5

х= 5-1+3

х= 7.

4.

(8х+11)-13=9х-5

8х+11-13=9х-5

8х-9х=-5-11+13

-х=-3

х=3

5.

-8х=-24

8х=24

Х=24:8

Х=3

6.

50х=5

Х=10

Answer 2

Ответ:

2

Объяснение:

5x+(3x-7)=9

(раскрываем скобки)

5х+3х-7=9

8х-7=9

8х=9+7(когда переносом, знак меняется)

8х=16

х=2

Answer 3

Let's solve each equation step by step:

1. 5x + (3x - 7) = 9

Combine like terms: 5x + 3x - 7 = 9 8x - 7 = 9

Add 7 to both sides: 8x - 7 + 7 = 9 + 7 8x = 16

Divide both sides by 8: (8x)/8 = 16/8 x = 2

Therefore, the solution to the equation is x = 2.

2. 3y - (5 - y) = 11

Distribute the negative sign inside the parentheses: 3y - 5 + y = 11

Combine like terms: 3y + y - 5 = 11 4y - 5 = 11

Add 5 to both sides: 4y - 5 + 5 = 11 + 5 4y = 16

Divide both sides by 4: (4y)/4 = 16/4 y = 4

Therefore, the solution to the equation is y = 4.

3. (7x + 1) - (6x + 3) = 5

Distribute the negative sign inside the second parentheses: 7x + 1 - 6x - 3 = 5

Combine like terms: 7x - 6x + 1 - 3 = 5 x - 2 = 5

Add 2 to both sides: x - 2 + 2 = 5 + 2 x = 7

Therefore, the solution to the equation is x = 7.

4. (8x + 11) - 13 = 9x - 5

Combine like terms: 8x + 11 - 13 = 9x - 5 8x - 2 = 9x - 5

Subtract 8x from both sides: 8x - 2 - 8x = 9x - 5 - 8x -2 = x - 5

Add 5 to both sides: -2 + 5 = x - 5 + 5 3 = x

Therefore, the solution to the equation is x = 3.

5. -8x = -24

Divide both sides by -8: (-8x)/(-8) = (-24)/(-8) x = 3

Therefore, the solution to the equation is x = 3.

6. 50x = 5

Divide both sides by 50: (50x)/50 = 5/50 x = 0.1

Therefore, the solution to the equation is x = 0.1.