Question

2,5=-0,3x+2,2 -5z+7,5=-2,5z

Answer 1

2,5=-0,3x+2,2
2,5-2,2=-0,3x
0,3=-0,3x
x=0,3 : (-0,3)
x=-1

-5z+7,5=-2,5z
-5z+2,5z=-7,5
-2,5z=-7,5
z=-7,5:(-2,5)
z=3

Answer 2

2,5=-3x+2,2
3x=2,2-2,5
3x=-0,3
x=-0,1

-5z+7,5=-2,5z
-5z+2,5z=-7,5
-2,5z=-7,5
z=3

Answer 3

To solve the system of equations:

2.5 = -0.3x + 2.2

-5z + 7.5 = -2.5z

We can simplify the second equation by adding 5z to both sides:

-5z + 5z + 7.5 = -2.5z + 5z

7.5 = 2.5z

Dividing both sides by 2.5, we get:

z = 3

Now we can substitute z = 3 into the first equation:

2.5 = -0.3x + 2.2

0.3x = 2.5 - 2.2

0.3x = 0.3

x = 1

Therefore, the solution to the system of equations is x = 1 and z = 3.