Question

-5x+20=-4+x -6(x+3)=3x+24 1,2x-0,2(2x+5)=-3,2

Answer 1

Ответ:

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Answer 2

Let's solve each equation step by step:

1. -5x + 20 = -4 + x

First, let's isolate x on one side of the equation:

$$\begin{align*} -5x + 20 &= -4 + x \\ -5x - x &= -4 - 20 \\ -6x &= -24 \\ x &= \frac{-24}{-6} \\ x &= 4 \end{align*}$$

2. -6(x + 3) = 3x + 24

Expand and then isolate x:

$$\begin{align*} -6x - 18 &= 3x + 24 \\ -6x - 3x &= 24 + 18 \\ -9x &= 42 \\ x &= \frac{42}{-9} \\ x &= -\frac{14}{3} \end{align*}$$

3. 1.2x - 0.2(2x + 5) = -3.2

Expand and then solve for x:

$$\begin{align*} 1.2x - 0.4x - 1 &= -3.2 \\ 0.8x &= -2.2 \\ x &= \frac{-2.2}{0.8} \\ x &\approx -2.75 \end{align*}$$

So, the solutions for each equation are:

1. $x = 4$
2. $x = -\frac{14}{3}$
3. $x \approx -2.75$