Lesson 50

Vocabulary: An _________ is a mathematical statement that compares quantities that are not equal.

• equality

• inequality

• equation

• variable

Translate the sentence below into an inequality.

137 is at least 13 less than twice a number.

• $137\ \le13\ -\ 2x$

• $137\ge13\ -\ 2x$

• $137\le2x\ -\ 13$

• $137\ge2x\ -\ 13$

Simplify

8y - 3 = 15

• y = 4

• $y\ =\ \frac{4}{9}$

• $y\ =\ \frac{9}{4}$

• y = 3

7 = 5x + 4

• $x\ =\ 3$

• $x\ =\ \frac{3}{5}$

• $x\ =\ \frac{2}{3}$

• x = 7