Respuesta :
D-15 = C + 22
-22 -22
D - 37 = C
2D = C
D - 37 = C
2D = D - 37
-D -D
D = -37 (Cam has 37 stickers.)
Dan has 74 stickers. Cam has 37 stickers.
Check
Dan has twice as many stickers as Cam. (check)
-22 -22
D - 37 = C
2D = C
D - 37 = C
2D = D - 37
-D -D
D = -37 (Cam has 37 stickers.)
Dan has 74 stickers. Cam has 37 stickers.
Check
Dan has twice as many stickers as Cam. (check)