Answer is x=2
Step by step.
They are using tiles to represent “x” variable and # constants.
See
3x tiles and 8 constants = 4 x tiles + 6 constants
So
3x + 8 = 4x + 6
Subtract 4x from both sides to isolate x
3x - 4x + 8 = 4x - 4x + 6
Combine
-1x + 8 = 6
Now subtract 8 from both sides
-1x + 8 -8 = 6 - 8
Combine
-1x = -2
x = 2