Respuesta :

Answer:

x = 3.7

Explanations:

The given equation is:

2x + y = 0.1 (y + 3)

To find the value of x when y = -7, substitute y = -7 into the given equation

2x + (-7) = 0.1 (-7 + 3)

2x - 7 = -0.1 ( -4)

2x - 7 = 0.4

2x = 0.4 + 7

2x = 7.4

x = 7.4 / 2

x = 3.7