4(3x-7) = 8

First multiply out the bracketsMultiply each component within the bracket by 4 (4 x 3x) + (4 x -7) = 812x - 28 = 8 Now you want to ensure you have the x's on their ownYou can eliminate the -28 by adding 28 to BOTH SIDES This leaves you with 12x = 36Now to get x alone you want to divide both sides by 12 This leaves you with x = 3 In order to check your answer you can substitute x = 3 back into the equation and see if it adds up correctly

JH

Related Maths KS3 answers

All answers ▸

What is 3+4*5


What is the Pythagoras’ theorem and how can it be used to work out the distance between two points?


Rearranging formulae


A bag has blue and red counters in a ration of 4:5. If there are 45 counters in the bag, how many red counters are there?