Question

-8x - 4 = 32 -7x ± 21=7 решите пример

Answer 1

-8x - 4 = 32

-8x=36

x=-4,5

-7x + 21 = 7

-7x = -14

x = 2

-7x - 21 = 7

-7x=28

x=-4

Answer 2

Ответ:

-8x-4=32

-8x=32+4

-8x= 36

x= -9/2( 9 вторых)

Answer 3

To solve the equations, we'll first handle each equation one by one.

1. -8x - 4 = 32

Step 1: Move the constant term to the other side of the equation by adding 4 to both sides: -8x = 32 + 4 -8x = 36

Step 2: Now, isolate x by dividing both sides by -8: x = 36 / -8 x = -4.5

2. -7x ± 21 = 7

Since there's a ± sign, we'll solve the equation for both cases (positive and negative).

Case 1: -7x + 21 = 7

Step 1: Move the constant term to the other side of the equation by subtracting 21 from both sides: -7x = 7 - 21 -7x = -14

Step 2: Isolate x by dividing both sides by -7: x = -14 / -7 x = 2

Case 2: -7x - 21 = 7

Step 1: Move the constant term to the other side of the equation by adding 21 to both sides: -7x = 7 + 21 -7x = 28

Step 2: Isolate x by dividing both sides by -7: x = 28 / -7 x = -4

So, the solutions for the equations are:

1. x = -4.5
2. x = 2 (Case 1)
3. x = -4 (Case 2)