Q: 3a - 1 when a equals 8?

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3a = 1a = 1/3 (a third)

Subtract 8 from each side: 3a = 33 Divide each side by 3: a = 11

12

-21 = 9a - 15 - 3a -6 = 6a -1 = a

3a-9 = 6 3a = 6+9 3a = 15 a = 15/3 a = 5 Substitute a = 5 into 4a-1. 4a-1 =4(5)-1 =20-1 =19 Therefore, the value of 4a-1 is 19.

Related questions

9 - 3a = 8Add 3a to each side:9 = 8 + 3aSubtract 8 from each side:1 = 3aDivide each side by 3:1/3 = a

3a=1divide both sides by 3a=1/3

3a = 1a = 1/3 (a third)

-3a-12 = 12+12 +12-3a = +12~ ~-3 -3a = -8

If: -3a-1 = -15 Then: a = 4 and 2/3

1

Subtract 8 from each side: 3a = 33 Divide each side by 3: a = 11

12

a = 14/3

1/3=a

y = (3 X 8) - 5 = 21.

Answer to: 5a + 1 = a - 3a = -1