Question

6х-4=-8-5+3х=-9х2х-8=-2(х+6)-(-4+х)=2х(5-9х)-(3+6х)=-7​

Answer 1

Объяснение:

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Answer 2

Let's break down each equation and solve for x:

1. 6x - 4 = -8 - 5 + 3x

First, let's simplify the right side of the equation:

-8 - 5 = -13

So now we have:

6x - 4 = -13 + 3x

Subtracting 3x from both sides, we get:

3x - 4 = -13

Adding 4 to both sides, we get:

3x = -9

Dividing both sides by 3, we get:

x = -3

2. -9x + 2x - 8 = -2(x + 6) - (-4 + x)

Let's simplify both sides of the equation:

-9x + 2x - 8 = -2x - 12 + 4 - x

Combining like terms, we get:

-7x - 4 = -3x - 8

Adding 7x to both sides, we get:

4x - 4 = -8

Adding 4 to both sides, we get:

4x = 0

Dividing both sides by 4, we get:

x = 0

3. 2x(5 - 9x) - (3 + 6x) = -7

First, let's distribute the 2x:

10x - 18x^2 - 3 - 6x = -7

Combining like terms, we get:

-18x^2 + 4x - 3 = -7

Adding 7 to both sides, we get:

-18x^2 + 4x + 4 = 0

Dividing both sides by -2, we get:

9x^2 - 2x - 2 = 0

We can use the quadratic formula to solve for x:

x = (-b ± sqrt(b^2 - 4ac)) / 2a

Where a = 9, b = -2, and c = -2.

Plugging in the values, we get:

x = (-(-2) ± sqrt((-2)^2 - 4(9)(-2))) / 2(9)

Simplifying:

x = (2 ± sqrt(4 + 72)) / 18

x = (2 ± sqrt(76)) / 18

x = (1 ± sqrt(19)) / 9

So the solutions are:

x = (1 + sqrt(19)) / 9 or x = (1 - sqrt(19)) / 9