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