3a x 2a =24
3.5
-21 = 9a - 15 - 3a -6 = 6a -1 = a
36 -20 = 16
p=b+3a+c p-3a-c=b+3a-3a+c-c p-3a-c=b b=p-3a-c
depends what 'a' =
3a + 4 = 4a - 3 4 = a -3 (subtract 3a from each side) 7 = a (add 3 to both sides) a = 7
4a-2=7a-6 4=3a a=4/3
3a=1divide both sides by 3a=1/3
-3a-12 = 12+12 +12-3a = +12~ ~-3 -3a = -8
a-1<2a-6<9+3a
3a = 1a = 1/3 (a third)