Question

(2x-5)*0,7-(-0,4x+2,5)=18x-6

Answer 1

Ответ:

Пошаговое объяснение:

(2x-5)*0,7-(-0,4x+2,5)=18x-6

1,4х-3,5+0,4х-2,5=18х-6

1,4х+0,4х-18х=2,5+3,5-6

-16,2х=0

Х=0:(-16,2)

Х=0

Answer 2

To solve the equation (2x-5)*0.7 - (-0.4x+2.5) = 18x - 6, follow these steps:

Step 1: Distribute the terms inside the parentheses and simplify the expression. Step 2: Combine like terms on both sides of the equation. Step 3: Isolate the variable (x) on one side of the equation. Step 4: Solve for x.

Let's go through each step:

Step 1: Distribute the terms inside the first parentheses: 0.7 * 2x - 0.7 * 5 = 1.4x - 3.5

Distribute the negative sign inside the second parentheses: -(-0.4x) - (-2.5) = 0.4x + 2.5

Now the equation becomes: 1.4x - 3.5 - (0.4x + 2.5) = 18x - 6

Step 2: Combine like terms: 1.4x - 3.5 - 0.4x - 2.5 = 18x - 6

Step 3: Now, combine the x terms on the left side of the equation: (1.4x - 0.4x) - 3.5 - 2.5 = 18x - 6 (1.4x - 0.4x) = 18x - 6 + 3.5 + 2.5

Simplify further: 1x = 18x - 6 + 6

Step 4: Now, isolate the variable (x) on one side of the equation. To do that, we'll bring all the x terms to the left side and the constants to the right side:

1x - 18x = 6 (1 - 18)x = 6 -17x = 6

Finally, solve for x: x = 6 / -17 x = -6/17

So, the solution to the equation is: x = -6/17