Answer:
x = - 2
Step-by-step explanation:
x - 3x = 2(4+x)
-2x = 2*4 + 2x
-2x = 8 + 2x
-2x - 2x = 8
-4x = 8
x = 8/-4
x = -2
Check:
-2 - (3*-2) = 2(4+(-2))
-2 - (-6) = 2(2)
-2 + 6 = 4