13-a = 7
-a = 7-13
-a = -6
a = 6
a equals 5
13a - 6 + a = 5a + 3 + 3a 13a + a - 5a - 3a = 3 + 6 6a = 9 6a/6 = 9/6 a = 3/2
You combine like terms so... 13a+12=54. Subtract 2 from both sides and you get 13a=52 . Then divide both sides by 13 and you get 4.. (:
9a + 4a = 26 13a = 26 a = 26/13 a = 2
14
Re-ordering it : 13a - a -15b + 2b = 12a - 13b
2a2 - 13a + 15 = (2a - 3) (a - 5)
x = 14
16-7 equals = 9
37-7 equals = 30
13a
7 pounds equals 7 pounds.