Algebra revision

x + 7 = 18

• x = 1

• x = 11

• x = 25

• x = 8

y - 8 = 1

• y = 9

• y = 8

• y = 7

• y = 11

• m = 3

• m = 40

• m = 10

• m = 30

5(x - 2) = 30

• x = 7

• x = 8

• x = 10

• x = 4

2x - 3 = 7

• x = 5

• x = 10

• x = 2

• x = 4

Equations must always

• be able to be solved

• balance

• contain x and y

• be easy!

28-4y = 2y+4

• y = 5.3

• y = 4

• y = -4

• y = -5.3

which operation should be completed first to find the value of the expression

16 - 6 + 4

• 16 − 6

• 6 + 4

• I don't remember!

• It doesn’t matter!

• 24 − 12 ÷ 8

• 24 − 12

• 24 − 6 + 6

• Not here!

• 7

• 14

• 56

• 49