Th difference of -2d and -3d is equal to the difference of 1/6 and 1/2

d = -1/3

Step-by-step explanation:

Difference means subtraction

Therefore

-2d - - 3d = 1/6 - 1/2

Note : - × - = +

-2d + 3d = 1/6 - 1/2

3d - 2d = (1-3)/6

d = -2/6

Divide both numerator and denominator by 2 to have it in lowest term.

d = (-2÷2)/(6÷2)

d = -1/3

d = -1/3

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its a straight line parallel to the time axis