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 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
3a + 11 = 7a - 13 subtract 3a from each side 3a - 3a + 11 = 7a - 3a - 13 11 = 4a - 13 add 13 to each side 11 + 13 = 4a - 13 + 13 24 = 4a divide each sides integer by 4 24/4 = (4/4)a 6 = a -------------check in original equation 3(6) + 11 = 7(6) - 13 18 + 11 = 42 - 13 29 = 29 ----------------checks out
a-16 = a/4+2 Multiply all terms by 4: 4a-64 = a+8 4a-a = 8+64 3a = 72 a = 24
4a-2=7a-6 4=3a a=4/3
3x=24 x=8
3a=1divide both sides by 3a=1/3