Question

решите уравнение:7(х-1)-2(2х+5)=5х-11

Answer 1

7х-7-4х-10=5х-11
7х-4х-5х=-11+7+10
-2х=6
х=-3

Answer 2

To solve the given equation 7(x-1) - 2(2x+5) = 5x - 11, we can follow these steps: 1. Distribute the terms inside the parentheses. 2. Combine like terms on both sides of the equation. 3. Solve for the variable x.

Let's solve the equation step by step:

Step 1: Distribute the terms inside the parentheses

First, distribute the terms inside the parentheses: 7x - 7 - 4x - 10 = 5x - 11

Step 2: Combine like terms on both sides of the equation

Combine the like terms on both sides of the equation: (7x - 4x - 5x) + (-7 - 10) = -11 -2x - 17 = -11

Step 3: Solve for the variable x

Add 17 to both sides of the equation: -2x = 6

Divide both sides by -2 to solve for x: x = -3

Solution

The solution to the equation 7(x-1) - 2(2x+5) = 5x - 11 is x = -3.