Equations

To solve for a variable in an equation...

• Do the opposite (inverse) operation on both sides of the equation

• Guess at what the letter might be

• Put a decimal into the answer after the hundreths place

• Multiply by x

Inverse means

• Opposite

• The known space outside of the Earth

• Exponential

• Speak fluently

The inverse operation of multiplication is...

• division

• addition

• subtraction

• exponents

The inverse operation of addition is...

• subtraction

• multiplication

• division

• cubed

Solve for k.

k − 15 = 4

• 19

• 32

• 22

• 11

Solve for c.

c − 10 = 5

• 15

• 5

• 2

• 30

Solve for g.

4g = 20

• 5

• 16

• 24

• 80

Solve for c.

c/3 = 4

• 12

• 1 1/3

• 7

• Escalator

Solve for c.

c/5 = 21

• 105

• 21/5

• 26

• 16

Solve for f.

15f = 360

• 24

• 3600

• 345

• 375