Question

820. 1) -2(х + 3) = 2х – 1;3) -(3х – 4) = 3х – 8;​

Answer 1

Ответ:

1) -2(х + 3) = 2х – 1

-2x-6=2x-1

-4x=5

$x=-\frac{5}{4}=-1,25$

3) -(3х – 4) = 3х – 8

-3x+4=3x-8

-6x=-12

x=2

Answer 2

Sure, let's solve the given equations step by step.

1. -2(х + 3) = 2х - 1:

First, distribute -2 to terms inside the parentheses: -2x - 6 = 2x - 1

Next, let's isolate x terms on one side and constants on the other: -2x - 2x = 1 - 6 -4x = -5

Now, divide both sides by -4 to solve for x: x = -5 / -4 x ≈ 1.25

2. -(3х - 4) = 3х - 8:

Distribute the negative sign: -3x + 4 = 3x - 8

Next, let's isolate x terms on one side and constants on the other: -3x - 3x = -8 - 4 -6x = -12

Now, divide both sides by -6 to solve for x: x = -12 / -6 x = 2

So, the solutions for the given equations are:

1. x ≈ 1.25
2. x = 2