Question

-2,8*(3х+7)-4,2=1,4 Решите

Answer 1

-2,8*(3х+7)-4,2=1,4
-2,8*3х+(-2,8)*7-4,2=1,4
-8,4х-19,6-4,2=1,4
-8,4х-23,8=1,4
-8,4х=1,4+23,8
-8,4х=25,2
х=25,2/-8,4
х=-3
Проверка
-2,8*(3*(-3)+7)-4,2=-2,8*(-9+7)-4,2=-2,8*(-2,)-4,2=5,6-4,2=
=1,4

Answer 2

Могу ошибаться, но вроде так

Answer 3

To solve the equation, let's simplify and solve for x step by step:

1. Distribute the multiplication on the left side: -2 * 3x - 2 * 7 + 8 = 1.4

2. Simplify the equation further: -6x - 14 + 8 = 1.4

3. Combine the constants on the left side: -6x - 6 = 1.4

4. Move the constant term to the right side by adding 6 to both sides: -6x = 1.4 + 6

5. Combine the constants on the right side: -6x = 7.4

6. Finally, solve for x by dividing both sides by -6: x = 7.4 / -6

Now, divide 7.4 by -6 to get the final answer:

x ≈ -1.233333...

So the solution to the equation is approximately x = -1.2333 (rounded to 4 decimal places).