Question

4x-1|3=0,(3)   уравнения    -2/7x+(-2,8)=1,6

Answer 1

4х-1/3=0
4х=1/3
х=1/12


-2/7х-2.8=8/5
-2/7х-14/5=8/5
-10х-98=56
-10х=56=98
-10х=154
х=-77/5
х=-15( цулая часть)2/5(дробь)
х=-15,4

Answer 2

To solve the equations, let's start with each one separately:

1. $4x - 1|3 = 0$

The equation seems a bit unclear. I'm not sure what the "|3" means. It could be a typo or a formatting issue. If you can provide more information about this equation, I'll be happy to help you solve it.

2. $-\frac{2}{7}x - 2.8 = 1.6$

Let's solve this equation:

First, let's isolate the variable $x$ on one side of the equation. We'll do this by getting rid of the constant term (-2.8) on the left side.

Step 1: Add 2.8 to both sides of the equation to move it to the right side:

$-\frac{2}{7}x = 1.6 + 2.8$

Step 2: Simplify the right side:

$-\frac{2}{7}x = 4.4$

Next, let's solve for $x$ by getting rid of the coefficient $-\frac{2}{7}$ on the left side. To do this, we'll multiply both sides by the reciprocal of $-\frac{2}{7}$, which is $-\frac{7}{2}$.

Step 3: Multiply both sides by $-\frac{7}{2}$:

$x = 4.4 \times \left(-\frac{7}{2}\right)$

Step 4: Simplify the right side:

$x = -15.4$

So, the solution to the equation is $x = -15.4$.