Equations

What is the first step to solve this equation:
11 - 3x = 44

• Add 3 to both sides
• Subtract 11 from both sides
• Add 11 to both sides
• Divide 3 on both sides.

Which equation has x=9 as a solution

• 4 + x = 12
• 5x = 45
• 2x = 20
• x + 7 = 26

Three times as many as six is eighteen

• 3 + 6 = 18
• 3 x 6 = 18
• 6 x 3 = 9
• 18 = 6 x 3

Carlos has 8 Xbox games. Carlos has twice as many (or two times as many) Xbox games as Jayda.

Which equation represents how many Xbox games Jayda has?

• C = 8

• J = 8 x 2

• 8 = 2 x J

• 8 = 2 + J

• J - 2 + 8

Which word problem has a solution of 9 x 3 = 27?

• Jan is 9 times older than her cousin Josh who is 3 years old. How old is Jan?
• Katrina buys 9 cupcakes for twenty seven cents each.  How much total money did Katrina spend?
• Don saves for 9 weeks to buy 3 games. How many weeks did Don save for each game?
• Sam spends $9 on a book and $3 on a notebook.  How much total money does Sam spend?

The value of the variable that we get on solving an equation is called _____

• Degree of the equation

• Co-efficient of the variable

• Solution or Root of the equation

• None of the above

What is the difference between an expression and equation?

• Expressions have an equal sign and equations do not have an equal sign

• Expressions do not have an equal sign and equations do have an equal sign

• There is not a difference

• Expressions do not have variables and equations have variables

What do the following terms mean:
is
equal
the same as 

• +
• -
• =
• x

In the equation

x + 7 = 12

7 is being added to the variable, x.

How should you show your work to isolate the variable and solve the equation?

• Subtract 7 from both sides. The solution is x = 5.

• Add 7 to both sides.

  The solution is x = 19.

• Multiply both sides by 7 The solution is x = 84.

What is the inverse operation of subtraction?

• Subtraction
• Multiplication
• Division
• Addition