Question

7x – 5(2x + 1) = 5х + 15

Answer 1

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

Answer 2

Ответ:

х= -2,5

Пошаговое объяснение:

7х-10х-5=5х+15 - раскрыли скобки                                                                                                                                                                            7х-10х-5х=15+5                                                                                                                     -8х=20                                                                                                                                 х=20: (-8)                                                                                                                                               х= -2,5

Answer 3

Let's solve the given equation step by step:

7x - 5(2x + 1) = 5x + 15

First, distribute the -5 to the terms inside the parentheses:

7x - 10x - 5 = 5x + 15

Combine like terms on both sides of the equation:

(7x - 10x) - 5 = (5x) + 15

-3x - 5 = 5x + 15

Next, we want to isolate the x terms on one side and the constant terms on the other side. Let's start by moving the 5x term to the left side by subtracting 5x from both sides:

-3x - 5 - 5x = 5x + 15 - 5x

-8x - 5 = 15

Next, let's move the constant term (-5) to the right side by adding 5 to both sides:

-8x - 5 + 5 = 15 + 5

-8x = 20

To solve for x, divide both sides of the equation by -8:

(-8x)/(-8) = 20/(-8)

Simplifying further:

x = -20/8

We can simplify the fraction:

x = -5/2

Therefore, the solution to the equation is x = -5/2 or -2.5.