Solving Equations and Inequalities

How do I solve this problem?

a

b

multiply these two

Get X alone

The model represents an equation. What is the value of x ?

Hint: Use Desmos then solve by hand to get that answer

Mathematical Equivalence

ON

0.1( x - 20 ) > 2

• x > 40

• x < 40

• x > 220

• -3m + 36
• -9m + 36
• 3m + 36

Fred Flintstone bought seven boxes to put with his collection of boxes. A week later half the boxes were ruined in the rain. There are now only 22 boxes left. With how many did he start? (Select the correct equation)

• (x + 7)/2  = 22

• x/2 + 7 = 22

• x + 7/2 = 22

Which expression is equivalent to (s - 12) / 2

• s/2 -12

• s - 6

• s/2 - 6

-12x > 36

• x > -3

• x > 48

• x < -3

- 3( 4 - 2x) = 6

• x = 1

• x = -3 

• x = 3

2(4x-1) = 39.6

Elijah is five years less than two times Victor’s age. Elijah is 9 years old. How old is Victor?

• x=2

• x=4

• x=7

• x=14