Equations – Success if you can do these 3x = 6 4x + 2 = 3x + 7 x/4 = 2 5x – 3 = 7 + 3x x + 3 = 17 3(x + 2) = 12 x – 4 = 13 4(x + 5) = 32 3x + 4 = 25 3(2x – 2) = 2(x + 6) 4x – 3 = 17 4(3x + 5) = 2(x + 15)
How to solve the 4x + 3 = 11 type of equation The 4, 3 and 11 Could be any numbers
4x + 3 =11 4x + 3 – 3 = 11 - 3 You get rid of the + 3 by - 3
4x + 3 =11 4x + 3 – 3 = 11 - 3 4x = 8 You get rid of the + 3 by - 3
4x + 3 =11 4x + 3 – 3 = 11 - 3 4x = 8 x = 8/4 You get rid of the + 3 by - 3 Divide both sides by 4
4x + 3 =11 4x + 3 – 3 = 11 - 3 4x = 8 x = 8/4 x = 2 You get rid of the + 3 by - 3 Divide both sides by 4
just subtract 3 from both sides then divide by 4 For equations like 4x + 3 = 11 just subtract 3 from both sides then divide by 4 4x + 3 = 11 4x = 11 - 3 4x = 8 x= 8/4 x = 2 Like this
How to solve the 5x – 3 = 17 type of equation The 5, 3 and 17 can be any numbers
5x – 3 = 17 5x – 3 + 3 = 17 + 3 You get rid of the – 3 by + 3
5x – 3 = 17 5x – 3 + 3 = 17 + 3 5x = 20 You get rid of the – 3 by + 3
5x – 3 = 17 5x – 3 + 3 = 17 + 3 5x = 20 x = 20/5 You get rid of the – 3 by + 3 Divide both sides by 5
5x – 3 = 17 5x – 3 + 3 = 17 + 3 5x = 20 x = 20/5 x = 4 You get rid of the – 3 by + 3 Divide both sides by 5
just add 3 to both sides then divide by 5 For equations like 5x – 3 = 17 just add 3 to both sides then divide by 5 5x – 3 = 17 5x = 17 + 3 5x = 20 x= 20/5 x = 4 Like this
Try these 1 2x + 4 = 16 7 2x – 5 = 13 2 3x + 7 = 29 8 3x – 7 = 28 3 10 5x – 15 = 40 5 7x + 6 = 69 11 7x – 19 = 37 6 8x + 23 = 55 12 9x – 12 = 42
Remember, always do the same thing to both sides. Felix is checking that you do this properly. 5x + 3 = 43 5x + 3 – 3 = 43 – 3 5x = 40 5x ÷ 5 = 40 ÷ 5 x= 8