Step-by-step explanation:
-4 + 2 + 4f = 8 - 3f
-2+4f=8-3f
7f=10
f=10/7
[tex] - 4 + 2 + 4f = 8 - 3f \\ - 2 + 4f = 8 - 3f \\ - 4f - 3f = - 2 - 8 \\ \frac{ - 7f }{ - 7} = \frac{ - 10}{ - 7} \\ f = \frac{10}{7} [/tex]
