Maths

maths revision

HideShow resource information
  • Created by: jas
  • Created on: 06-01-10 18:06

Sloving Eqations

If an equation has brackets in it one method of solving it is to multiply out the brackets first, for example:

Solve the equation 3(b + 2) = 15

  • Write down the equation:
  • 3(b + 2) = 15
  • Multiply out the brackets. Remember, everything inside the brackets gets multiplied by 3
  • 3 × b + 3 ×2 = 15
  • When you have multiplied out the brackets you get:
  • 3b + 6 = 15
  • Next, undo the + 6. In other words, do the inverse and subtract 6 from both sides.
  • 3b + 6 - 6 = 15 - 6
  • So 3b = 9

Therefore, to find out what b is you need to do the inverse of multiplying by 3 which is dividing by 3.

So b = 3

1 of 1

Comments

tayler

fanytastiic!!!!

Similar Mathematics resources:

See all Mathematics resources »See all Algebra resources »