1

SFR LESSON NOTES

Solving Inequalities

Grade C/B

Algebra

2

Inequalities

‐2 < x ≤1

x is an integerWrite down all the possible

values for x

3

InequalitiesSolve

2x + 3 < 14C

4

InequalitiesSolve

5x ‐ 2 < 4C

5

6

InequalitiesSolve

1 < 3x + 4 ≤ 13B

7

8

InequalitiesC & B1 2

3

4 5

9

InequalitiesShow each of the following;

y≤3 ; x > 7 ; ‐3≤y<5 ; y = 2x + 3B

10

y = 3x ‐ 1

11

y = 2x + 6

12

4x + 5y = 20

13

2x ‐3y = 12

14

2 ways of drawing graphs

1) using y = mx + ceg.

2) Making x = 0 then y = 0

eg.

15

Split these equations into 2 groups

3x + 2y = 6 5x ‐ 2y = 15

2x ‐ 3y = 15

6x + 5y = 30

y = 4x ‐3y = 6x ‐ 5

y = 3x ‐ 9

y = 7 ‐ x

Draw these lines onto one grid