Question

19). -7(х + 3) + 9 = 5 – 6х 20). –(11х - 7) + (7х + 9) = 8

Answer 1

Ответ:

Пошаговое объяснение:

19).

-7(х + 3) + 9 = 5 – 6х

-7x - 21 + 9 = 5 - 6x

7x - 6x = -21 + 9 - 5

x = -17

20).

–(11х - 7) + (7х + 9) = 8

-11x + 7 + 7x + 9 = 8

-4x + 16 = 8

4x = 16 - 8

4x = 8

x = 8 : 4

x = 2

Answer 2

Ответ:

19)17 20)2

Пошаговое объяснение:

......................................................

Answer 3

Let's solve the given equations step by step:

19. -7(x + 3) + 9 = 5 - 6x

Step 1: Distribute the -7 on the left side: -7x - 21 + 9 = 5 - 6x

Step 2: Combine like terms on the left side: -7x - 12 = 5 - 6x

Step 3: Get all x terms on one side and constants on the other side: -7x + 6x = 5 + 12

Step 4: Combine like terms: -x = 17

Step 5: Solve for x by multiplying both sides by -1 to isolate x: x = -17

So the solution for equation 19) is x = -17.

20. -(11x - 7) + (7x + 9) = 8

Step 1: Distribute the negative sign on the left side: -11x + 7 + 7x + 9 = 8

Step 2: Combine like terms on the left side: -11x + 7x + 7 + 9 = 8

Step 3: Combine constants on the left side: -4x + 16 = 8

Step 4: Move 16 to the right side by subtracting 16 from both sides: -4x = 8 - 16

Step 5: Simplify the right side: -4x = -8

Step 6: Solve for x by dividing both sides by -4: x = -8 / -4

Step 7: Simplify the right side: x = 2

So the solution for equation 20) is x = 2.