Question

5х-6=12-х 0,8(4х+5)=- 3,2

Answer 1

5х-6=12-х
5х+х=12+6
6х=18
х=3
0,8(4х+5)=-3,2/:0,8
4х+5=-4
4х=-4-5
4х=-9
х=-9/4

Answer 2

To solve the equations, you can follow these steps:

1. Solve the first equation: 5x - 6 = 12 - x

   Add x to both sides: 5x + x - 6 = 12

   Combine like terms: 6x - 6 = 12

   Add 6 to both sides: 6x - 6 + 6 = 12 + 6

   Simplify: 6x = 18

   Divide by 6: 6x/6 = 18/6

   Simplify: x = 3

So, the solution to the first equation is x = 3.

2. Solve the second equation: 0.8(4x + 5) = -3.2

   First, distribute the 0.8 on the left side: 0.8 * 4x + 0.8 * 5 = -3.2

   Simplify: 3.2x + 4 = -3.2

   Subtract 4 from both sides: 3.2x + 4 - 4 = -3.2 - 4

   Simplify: 3.2x = -7.2

   Divide by 3.2: 3.2x/3.2 = -7.2/3.2

   Simplify: x = -2.25

So, the solution to the second equation is x = -2.25.