5d+3d = 15 8d = 15 d = 15/8 = 1.875
8d of course
2(5c + 2d)(5c + 2d)
62•4= 4•2=8 6•4=24 so add the two #'s and you get 248 8D
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5d+3d = 15 8d = 15 d = 15/8 = 1.875
r3(r - 5d)(r + 8d)
8d-3d =65 plus work
-8d + 8d = 0
Expressed algebraically, d + 7d = 8d.
11
2d + 11e +8d + 11e = 10d + 22e
d2 + 8d + 7 = (d + 7) (d + 1)
18
8d of course
You need to know d.
3d + 8d - d - 5 = 10d - 5 = 5*(2d - 1)