Question

7*(x+0,4)=5*(x-0,4)=

Answer 1

Объяснение:

$7 \times (x + 0.4) = 5 \times (x - 0.4) \\ 7x + 2.8 = 5x - 2 \\ 7x - 5x = - 2 - 2.8 \\ 2x = - 2 - 2.8 \\ 2x = - 4.8 \\ x = - 2.4$

Answer 2

To solve this equation for "x," you can set up and solve two equations, one for each equality, and then find the common solution if it exists. Here's how you can do it:

First equation: 7*(x + 0.4) = 5*(x - 0.4)

Now, distribute the numbers on both sides of the equation:

7x + 7(0.4) = 5x - 5(0.4)

Next, simplify by performing the multiplications:

7x + 2.8 = 5x - 2.0

Now, let's isolate the variable "x" on one side of the equation. To do this, you can subtract 5x from both sides:

7x - 5x + 2.8 = -2.0

Combine like terms:

2x + 2.8 = -2.0

Now, subtract 2.8 from both sides:

2x + 2.8 - 2.8 = -2.0 - 2.8

2x = -4.8

Finally, divide by 2 to isolate "x":

2x/2 = -4.8/2

x = -2.4

So, the solution to the equation is x = -2.4.