Finding Unknown Values

What number makes this equation true? 7 x ∆ = 42

• 8

• 6

• 4

• 7

A number that we DO NOT know

• imaginary

• unknown number

• known number

• I have No idea!

5 = ? ÷ 3

• 15

• 8

• 2

• 11

20 ÷ ? = 2

• 22

• 18

• 40

• 10

Solve for the unknown number.

• 2

• 1

• 7

• 3

For what value of u is the equation true?

10 divided by u = 10

• u=1

• u=0

• u=10

• u=100

Find the number that makes this equation true.

45 divided by n = 9

• n=10

• n=7

• n=5

• n=3

64 = _ x 8

• 6

• 7

• 8

• 9

12 divided by _ = 2

• 7

• 6

• 8

• 4

Find the number that makes this equation true.

_ divided by 7 = 11

• 63

• 70

• 77

• 78