Question

1,6(а – 4) – 6,6 = 3(0,4а – 7)

Answer 1

Ответ:

1,6a-6,4-6,6=1,2a-21

1,6a-1,2a=-21+13

0,4a=-8

a=-20

Answer 2

To solve the equation 1.6(a - 4) - 6.6 = 3(0.4a - 7), you can follow these steps:

1. Distribute the constants and variables on both sides of the equation:

   1.6a - 6.4 - 6.6 = 1.2a - 21

2. Combine like terms on each side of the equation:

   1.6a - 6.4 - 6.6 = 1.2a - 21 (1.6a - 6.4) - 6.6 = 1.2a - 21 (1.6a - 13) = 1.2a - 21

3. Move all terms containing 'a' to one side and constants to the other side of the equation. You can do this by subtracting 1.2a from both sides:

   (1.6a - 13) - 1.2a = (1.2a - 21) - 1.2a 0.4a - 13 = -21

4. Add 13 to both sides to isolate the variable 'a':

   0.4a - 13 + 13 = -21 + 13 0.4a = -8

5. Finally, divide both sides by 0.4 to solve for 'a':

   (0.4a) / 0.4 = (-8) / 0.4 a = -20

So, the solution to the equation is a = -20.