Answer:
Step-by-step explanation:
9=-d+17
(add d to both sides because it is the opposite of subtracting)
9+d=17
(subtract 9 from both sides because it is the opposite of adding)
d=17-9=8
Step-by-step explanation:
1. substract 17 to both sides
2. know you have -8=-d
3. divide both sides by -1 in order to get a positive answer
4. total answer d= 8
