Question

-4(2,3х-4)-(3-2,6х)+3(0,6х-4)​ х=7/12

Answer 1

Ответ:

Пошаговое объяснение:

-9,2x+16-3+2,6x+1,8x-12= - 4,8x+1

-4,8*7/12+1= -48/10*7/12+1= -4/10*7/1+1= -0,4*7+1= -2,8+1= -1,8

Answer 2

Ответ:

-4(2,3х-4)-(3-2,6х)+3(0,6х-4)​= -9,2x+16-3+2,6x+1,8x-12 = -4,8x+1

Answer 3

To simplify the expression -4(2.3x - 4) - (3 - 2.6x) + 3(0.6x - 4) when x = 7/12, you can substitute the value of x into the expression and then perform the calculations.

1. Substitute x = 7/12 into the expression: -4(2.3 * (7/12) - 4) - (3 - 2.6 * (7/12)) + 3(0.6 * (7/12) - 4)

2. Simplify each term step by step:

   -4(2.3 * (7/12) - 4) = -4(1.15 - 4) = -4(-2.85)

   -(3 - 2.6 * (7/12)) = -(3 - 1.45) = -(1.55)

   3(0.6 * (7/12) - 4) = 3(0.35 - 4) = 3(-3.65)

3. Now, add the three simplified terms together:

-4(-2.85) - (-1.55) + 3(-3.65)

4. Perform the multiplications and additions:

   11.4 + 1.55 - 10.95

5. Finally, add and subtract the terms:

   (11.4 - 10.95) + 1.55 = 0.45 + 1.55 = 2

So, when x = 7/12, the simplified expression equals 2.