Answer :
D = I - 5
D = 3x
Plug in 3x for 'D' in the first equation:
D = I - 5
3x = I - 5
Add 5 to both sides:
3x + 5 = I
D = 3x
Plug in 3x for 'D' in the first equation:
D = I - 5
3x = I - 5
Add 5 to both sides:
3x + 5 = I