Question

1) 9x - 7 = 6x + 14 2) 0.6 -1.6 * (x-4) = 3 * (7 - 0.4x) 3) (12Y + 18) * (1.6 - 0.2Y) = 0 Ребята очень прошу, помогите решить!

Answer 1

Ответ:

2) 0,6-1,6(x-4)=3(7-0,4x)

0,6-1,6х+6,4=21-1,2х

-0,4х=14

х= - 35

Пошаговое объяснение:

ДРУГОЕ НЕ СМОГЛА РЕШИТЬ :(

Answer 2

1. To solve the equation 9x - 7 = 6x + 14, we need to isolate the variable x on one side of the equation.

Subtract 6x from both sides of the equation: 9x - 6x - 7 = 6x - 6x + 14

Simplifying the equation gives: 3x - 7 = 14

Add 7 to both sides of the equation: 3x - 7 + 7 = 14 + 7

Simplifying further: 3x = 21

Divide both sides of the equation by 3: (3x)/3 = 21/3

The equation simplifies to: x = 7

Therefore, the solution to the equation 9x - 7 = 6x + 14 is x = 7.

2. Let's solve the equation 0.6 - 1.6 * (x-4) = 3 * (7 - 0.4x).

Start by simplifying the equation: 0.6 - 1.6x + 6.4 = 21 - 1.2x

Combine like terms: -1.6x - 1.2x + 6.4 - 21 = 0

Simplify further: -2.8x - 14.6 = 0

Add 14.6 to both sides of the equation: -2.8x - 14.6 + 14.6 = 0 + 14.6

Simplifying gives: -2.8x = 14.6

Divide both sides of the equation by -2.8: (-2.8x)/(-2.8) = 14.6/(-2.8)

The equation simplifies to: x = -5.2143 (rounded to four decimal places)

Therefore, the solution to the equation 0.6 - 1.6 * (x-4) = 3 * (7 - 0.4x) is x ≈ -5.2143.

3. The equation (12Y + 18) * (1.6 - 0.2Y) = 0 implies that the product of the two terms equals zero.

So, we have two possibilities:

1. 12Y + 18 = 0
2. 1.6 - 0.2Y = 0

For the first possibility, subtract 18 from both sides of the equation: 12Y = -18

Divide both sides of the equation by 12: (12Y)/12 = (-18)/12

The equation simplifies to: Y = -1.5

For the second possibility, subtract 1.6 from both sides of the equation: -0.2Y = -1.6

Divide both sides of the equation by -0.2: (-0.2Y)/(-0.2) = (-1.6)/(-0.2)

The equation simplifies to: Y = 8

Therefore, the solutions to the equation (12Y + 18) * (1.6 - 0.2Y) = 0 are Y = -1.5 and Y = 8.