Solving equations

Solve 4n - 2n = 4.

• 2

• 4

• 6

• 8

Solve 2 + 5x + 2x = -12.

For which equation would you add 12 as the first step?

Solve 3 = x + 3 - 5x.

• x = -6

• x = 0

• x = -1

• x = 6

You solve an equation and find that 7 = 9 in your final step. What does this mean?

• The equation has 1 solution.

• The equation has no solution.

• The equation has infinitely many solutions.

• The equation is an identity.

Which of the following does not represent x - 5?

• The difference of a number and 5

• A number decreased by 5

• 5 subtracted from a number

• A number less than 5

• 19

• 27

• 11

• 15

• x = 1

• x = 4

• x = -8

• x = -5