Question

3х+4х ̶12,9=44,5 СРОЧНООООООООООООООООО

Answer 1

Ответ:

$x = 8.2$

Пошаговое объяснение:

$3x + 4x - 12.9 = 44.5$

$7x - 12.9 = 44.5$

$7x = 44.5 + 12.9$

$7x = 57.4$

$x = \frac{57.4}{7}$

$x = 8.2$

Перевiрка:

$3 \times 8.2 + 4 \times 8.2 - \\ - 12.9 = 44.5$

$24.6 + 32.8 - 12.9 = 44.5$

$44.5 = 44.5$

$44.5 - 44.5 = 0$

$0 = 0$

Вiдплвiдь:

$x = 8.2$

Answer 2

To solve the equation 3x + 4x - 12.9 = 44.5, we can combine like terms and simplify it.

First, combine the x terms on the left side of the equation: 3x + 4x = 7x.

The equation becomes: 7x - 12.9 = 44.5.

To isolate the variable x, we need to get rid of the constant term -12.9. We can do this by adding 12.9 to both sides of the equation:

7x - 12.9 + 12.9 = 44.5 + 12.9,

which simplifies to: 7x = 57.4.

Now, to solve for x, we divide both sides of the equation by 7:

(7x)/7 = 57.4/7,

resulting in: x = 8.2.

Therefore, the solution to the equation 3x + 4x - 12.9 = 44.5 is x = 8.2.