15d + 7 = 7d + 15 is an equation in one variable, d.
Commutativity.
If 16 - 7d = -3 d + 2, collecting like terms with "d" on the left side yields -4d = -14, or d = 14/4 = 7/2.
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
7d - 12 + 2d + 3 = 18Group the like terms for d on the left side. Move the integers to the right side remembering to reverse their signs (positive/negative)7d + 2d = 18 + 12 - 3Which becomes:9d = 27Divide each side by 9:d = 3
15d + 7 = 7d + 15 is an equation in one variable, d.
Commutativity.
-7d = 50 + 2d -9d = 50 d = -50/9 Or about -5.6
2 - 7d = -75 7d = 2 - (-75) 7d = 77 d = 77/7 d = 11
7d-8=7 / 7d=7+8 / 7d=15 / d=15:7 / d=2,14285.....
If 16 - 7d = -3 d + 2, collecting like terms with "d" on the left side yields -4d = -14, or d = 14/4 = 7/2.
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
d = 11
7d - 2 = 12, solve for d:7d = 12 + 2, so7d = 14.d = 14 / 7, sod = 2
7d - 12 + 2d + 3 = 18Group the like terms for d on the left side. Move the integers to the right side remembering to reverse their signs (positive/negative)7d + 2d = 18 + 12 - 3Which becomes:9d = 27Divide each side by 9:d = 3
-7d = 15 Therefore, d = 15/-7 d = -2.142857 recurring (that is, -2.142857142857...) or -2 and one seventh.
7d + 2 < 51 7d < 49 d < 7