1. 7d-13=3d+72. 7d-20=3d3. -20=-4d4. d=55. Check your answer:7*5-13=22, 3*5+7=22D equals 5
If: d+7 = 5 Then: d = -2 by subtracting 7 from both sides
c = 6 and d = 7
4
Commutativity.
the answer is a
d=17
1. 7d-13=3d+72. 7d-20=3d3. -20=-4d4. d=55. Check your answer:7*5-13=22, 3*5+7=22D equals 5
If: d+7 = 5 Then: d = -2 by subtracting 7 from both sides
c = 6 and d = 7
4
Commutativity.
Doc, Happy, Grumpy, Sleepy, Bashful, Sneezy and Dopey equal[s] the 7 dwarves.
That's the equation.
10
15d + 7 = 7d + 15 is an equation in one variable, d.
13. that's all there is to it. 7(1)+6 7+6 =13 7x1=7 7+6=13 so 13 is your answer :D