Give+an+example+Set3

In compound inequalities, "or" statements can yield the answer all real number. This occurs when both arrows cross over each other, and are pointing in opposite directions along the number line. Ex. x 2

However, an "and" statement can never yield the answer all real numbers because the restrictions would create a barbell answer set.

Ex. x 2

3x + 4y = 12 15x + 20y = 42

5(3x + 4y) = 60 15x + 20y = 42

15x + 20y = 60 15x + 20y = 42 (subtract)

0 = 18
 * NO SOLUTION**