TOPIC3: INEQUALITIES

INEQUALITIES

An inequality is like an equation that uses symbols for "less than"(<) and "greater than"(>) where an equation uses a symbol for "is equal to" (=).          

 



 

 

 

 

 

 

 

 

 

 

 

 

Example 1:
 

3x < 7 + 3

We can simplify 7 + 3 without affecting the inequality: 3x < 10

Example 2:

x + 3 < 7

If we subtract 3 from both sides, we get:

                 x + 3 - 3 < 7 - 3 = x < 4

And that is our solution: x < 4

Example 3:

 2x + 3 ≤ 15

 

2x ≤ 15 - 3
why its (-3) because in front the number 3 is (+) so if the sign bring to backwards it's become (-) sign. 

2x ≤ 12
x ≤ 12/2
x ≤ 6

Now this are the question if you wanna try.


Question1

12 < x + 5

Question2

3y < 15

Question3

-2y < -8